diff --git a/specification/billing/resource-manager/Microsoft.Billing/preview/2020-11-01-preview/examples/ReservationByBillingAccount.json b/specification/billing/resource-manager/Microsoft.Billing/preview/2020-11-01-preview/examples/ReservationByBillingAccount.json
new file mode 100644
index 000000000000..34d130f5f0bf
--- /dev/null
+++ b/specification/billing/resource-manager/Microsoft.Billing/preview/2020-11-01-preview/examples/ReservationByBillingAccount.json
@@ -0,0 +1,62 @@
+{
+  "parameters": {
+    "api-version": "2020-11-01-preview",
+    "billingAccountName": "{billingAccountName}",
+    "reservationOrderId": "{reservationOrderId}",
+    "reservationId": "{reservationId}"
+  },
+  "responses": {
+    "200": {
+      "body": {
+        "id": "/providers/Microsoft.Billing/billingAccounts/{billingAccountName}/reservationOrders/{reservationOrderId}/reservations/{reservationId}",
+        "type": "microsoft.billing/reservationOrders",
+        "name": "Reservation Name",
+        "location": "global",
+        "sku": {
+          "name": "sql_enterprise_licenses"
+        },
+        "properties": {
+          "appliedScopes": null,
+          "appliedScopeType": "Shared",
+          "reservedResourceType": "SqlAzureHybridBenefit",
+          "quantity": 1,
+          "provisioningState": "Succeeded",
+          "expiryDate": null,
+          "reviewDate": null,
+          "provisioningSubState": null,
+          "displayName": "SQL_Server_Enterprise_Edition",
+          "userFriendlyRenewState": "NotApplicable",
+          "userFriendlyAppliedScopeType": "Shared",
+          "effectiveDateTime": "2020-07-30T18:36:50.7939106Z",
+          "skuDescription": null,
+          "term": null,
+          "renew": false,
+          "renewSource": null,
+          "utilization": {
+            "trend": null,
+            "aggregates": [
+              {
+                "grain": 1.0,
+                "grainUnit": "days",
+                "value": null,
+                "valueUnit": "percentage"
+              },
+              {
+                "grain": 7.0,
+                "grainUnit": "days",
+                "value": null,
+                "valueUnit": "percentage"
+              },
+              {
+                "grain": 30.0,
+                "grainUnit": "days",
+                "value": null,
+                "valueUnit": "percentage"
+              }
+            ]
+          }
+        }
+      }
+    }
+  }
+}
diff --git a/specification/billing/resource-manager/Microsoft.Billing/preview/2020-11-01-preview/examples/ReservationByBillingProfile.json b/specification/billing/resource-manager/Microsoft.Billing/preview/2020-11-01-preview/examples/ReservationByBillingProfile.json
new file mode 100644
index 000000000000..2dc3aa7a0773
--- /dev/null
+++ b/specification/billing/resource-manager/Microsoft.Billing/preview/2020-11-01-preview/examples/ReservationByBillingProfile.json
@@ -0,0 +1,63 @@
+{
+  "parameters": {
+    "api-version": "2020-11-01-preview",
+    "billingAccountName": "{billingAccountName}",
+    "billingProfileName": "{billingProfileName}",
+    "reservationOrderId": "{reservationOrderId}",
+    "reservationId": "{reservationId}"
+  },
+  "responses": {
+    "200": {
+      "body": {
+        "id": "/providers/Microsoft.Billing/billingAccounts/{billingAccountName}/billingProfiles/{billingProfileName}/reservationOrders/{reservationOrderId}/reservations/{reservationId}",
+        "type": "microsoft.billing/reservationOrders",
+        "name": "Reservation Name",
+        "location": "global",
+        "sku": {
+          "name": "sql_enterprise_licenses"
+        },
+        "properties": {
+          "appliedScopes": null,
+          "appliedScopeType": "Shared",
+          "reservedResourceType": "SqlAzureHybridBenefit",
+          "quantity": 1,
+          "provisioningState": "Succeeded",
+          "expiryDate": null,
+          "reviewDate": null,
+          "provisioningSubState": null,
+          "displayName": "SQL_Server_Enterprise_Edition",
+          "userFriendlyRenewState": "NotApplicable",
+          "userFriendlyAppliedScopeType": "Shared",
+          "effectiveDateTime": "2020-07-30T18:36:50.7939106Z",
+          "skuDescription": null,
+          "term": null,
+          "renew": false,
+          "renewSource": null,
+          "utilization": {
+            "trend": null,
+            "aggregates": [
+              {
+                "grain": 1.0,
+                "grainUnit": "days",
+                "value": null,
+                "valueUnit": "percentage"
+              },
+              {
+                "grain": 7.0,
+                "grainUnit": "days",
+                "value": null,
+                "valueUnit": "percentage"
+              },
+              {
+                "grain": 30.0,
+                "grainUnit": "days",
+                "value": null,
+                "valueUnit": "percentage"
+              }
+            ]
+          }
+        }
+      }
+    }
+  }
+}
diff --git a/specification/billing/resource-manager/Microsoft.Billing/preview/2020-11-01-preview/examples/ReservationOrderByBillingAccount.json b/specification/billing/resource-manager/Microsoft.Billing/preview/2020-11-01-preview/examples/ReservationOrderByBillingAccount.json
new file mode 100644
index 000000000000..b50bc5bd2528
--- /dev/null
+++ b/specification/billing/resource-manager/Microsoft.Billing/preview/2020-11-01-preview/examples/ReservationOrderByBillingAccount.json
@@ -0,0 +1,38 @@
+{
+  "parameters": {
+    "api-version": "2020-11-01-preview",
+    "billingAccountName": "{billingAccountName}",
+    "reservationOrderId": "{reservationOrderId}"
+  },
+  "responses": {
+    "200": {
+      "body": {
+        "id": "/providers/Microsoft.Billing/billingAccounts/{billingAccountName}/reservationOrders/{reservationOrderId}",
+        "type": "microsoft.billing/reservationOrders",
+        "name": "Reservation Name",
+        "properties": {
+          "productType": "AzureHybridBenefit",
+          "tenantId": "00000000-0000-0000-0000-000000000000",
+          "effectiveDate": "2020-07-30T18:36:50.7939106Z",
+          "requestPurchaseTime": "0001-01-01T00:00:00",
+          "expiryDate": null,
+          "reviewDate": null,
+          "endDate": null,
+          "term": "None",
+          "reservationName": "SQL_Server_Enterprise_Edition",
+          "billingScope": "",
+          "billingPlanDetails": null,
+          "state": "Created",
+          "subState": "Active",
+          "reservations": [
+            "00000000-0000-0000-0000-000000000000"
+          ],
+          "enrollmentId": null,
+          "originalQuantity": 1,
+          "extendedErrorInformation": null,
+          "benefitScopeBillingAliasId": "/providers/Microsoft.Billing/billingAccounts/00000000-0000-0000-0000-000000000000:00000000-0000-0000-0000-000000000000_2019-05-31/billingProfiles/AB12-AB12-123-ABC"
+        }
+      }
+    }
+  }
+}
diff --git a/specification/billing/resource-manager/Microsoft.Billing/preview/2020-11-01-preview/examples/ReservationOrderByBillingProfile.json b/specification/billing/resource-manager/Microsoft.Billing/preview/2020-11-01-preview/examples/ReservationOrderByBillingProfile.json
new file mode 100644
index 000000000000..df421daa22d4
--- /dev/null
+++ b/specification/billing/resource-manager/Microsoft.Billing/preview/2020-11-01-preview/examples/ReservationOrderByBillingProfile.json
@@ -0,0 +1,39 @@
+{
+  "parameters": {
+    "api-version": "2020-11-01-preview",
+    "billingAccountName": "{billingAccountName}",
+    "billingProfileName": "{billingProfileName}",
+    "reservationOrderId": "{reservationOrderId}"
+  },
+  "responses": {
+    "200": {
+      "body": {
+        "id": "/providers/Microsoft.Billing/billingAccounts/{billingAccountName}/billingProfiles/{billingProfileName}/reservationOrders/{reservationOrderId}",
+        "type": "microsoft.billing/reservationOrders",
+        "name": "Reservation Name",
+        "properties": {
+          "productType": "AzureHybridBenefit",
+          "tenantId": "00000000-0000-0000-0000-000000000000",
+          "effectiveDate": "2020-07-30T18:36:50.7939106Z",
+          "requestPurchaseTime": "0001-01-01T00:00:00",
+          "expiryDate": null,
+          "reviewDate": null,
+          "endDate": null,
+          "term": "None",
+          "reservationName": "SQL_Server_Enterprise_Edition",
+          "billingScope": "",
+          "billingPlanDetails": null,
+          "state": "Created",
+          "subState": "Active",
+          "reservations": [
+            "00000000-0000-0000-0000-000000000000"
+          ],
+          "enrollmentId": null,
+          "originalQuantity": 1,
+          "extendedErrorInformation": null,
+          "benefitScopeBillingAliasId": "/providers/Microsoft.Billing/billingAccounts/00000000-0000-0000-0000-000000000000:00000000-0000-0000-0000-000000000000_2019-05-31/billingProfiles/AB12-AB12-123-ABC"
+        }
+      }
+    }
+  }
+}
diff --git a/specification/billing/resource-manager/Microsoft.Billing/preview/2020-11-01-preview/reservations.json b/specification/billing/resource-manager/Microsoft.Billing/preview/2020-11-01-preview/reservations.json
new file mode 100644
index 000000000000..3e560de52e59
--- /dev/null
+++ b/specification/billing/resource-manager/Microsoft.Billing/preview/2020-11-01-preview/reservations.json
@@ -0,0 +1,863 @@
+{
+  "swagger": "2.0",
+  "info": {
+    "version": "2020-11-01-preview",
+    "title": "BillingManagementClient",
+    "description": "Billing client provides access to billing resources for Azure subscriptions."
+  },
+  "host": "management.azure.com",
+  "schemes": [
+    "https"
+  ],
+  "consumes": [
+    "application/json"
+  ],
+  "produces": [
+    "application/json"
+  ],
+  "paths": {
+    "/providers/Microsoft.Billing/operations": {
+      "get": {
+        "tags": [
+          "Operations"
+        ],
+        "operationId": "Operations_List",
+        "description": "Lists the available billing REST API operations.",
+        "parameters": [
+          {
+            "$ref": "#/parameters/apiVersionParameter"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "OK. The request has succeeded.",
+            "schema": {
+              "$ref": "#/definitions/OperationListResult"
+            }
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "#/definitions/ErrorResponse"
+            }
+          }
+        },
+        "x-ms-pageable": {
+          "nextLinkName": "nextLink"
+        }
+      }
+    },
+    "/providers/Microsoft.Billing/billingAccounts/{billingAccountName}/reservationOrders/{reservationOrderId}": {
+      "get": {
+        "tags": [
+          "Reservations"
+        ],
+        "x-ms-examples": {
+          "ReservationOrderByBillingAccount": {
+            "$ref": "./examples/ReservationOrderByBillingAccount.json"
+          }
+        },
+        "operationId": "Reservations_GetReservationOrderByBillingAccount",
+        "description": "Gets a reservation order for a billing account.",
+        "parameters": [
+          {
+            "$ref": "#/parameters/apiVersionParameter"
+          },
+          {
+            "$ref": "#/parameters/billingAccountNameParameter"
+          },
+          {
+            "$ref": "#/parameters/reservationOrderIdParameter"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "OK. The request has succeeded.",
+            "schema": {
+              "$ref": "#/definitions/ReservationOrder"
+            }
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "#/definitions/ErrorResponse"
+            }
+          }
+        }
+      }
+    },
+    "/providers/Microsoft.Billing/billingAccounts/{billingAccountName}/billingProfiles/{billingProfileName}/reservationOrders/{reservationOrderId}": {
+      "get": {
+        "tags": [
+          "Reservations"
+        ],
+        "x-ms-examples": {
+          "ReservationOrderByBillingProfile": {
+            "$ref": "./examples/ReservationOrderByBillingProfile.json"
+          }
+        },
+        "operationId": "Reservations_GetReservationOrderByBillingProfile",
+        "description": "Gets a reservation order for a billing profile.",
+        "parameters": [
+          {
+            "$ref": "#/parameters/apiVersionParameter"
+          },
+          {
+            "$ref": "#/parameters/billingAccountNameParameter"
+          },
+          {
+            "$ref": "#/parameters/billingProfileNameParameter"
+          },
+          {
+            "$ref": "#/parameters/reservationOrderIdParameter"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "OK. The request has succeeded.",
+            "schema": {
+              "$ref": "#/definitions/ReservationOrder"
+            }
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "#/definitions/ErrorResponse"
+            }
+          }
+        }
+      }
+    },
+    "/providers/Microsoft.Billing/billingAccounts/{billingAccountName}/reservationOrders/{reservationOrderId}/reservations/{reservationId}": {
+      "get": {
+        "tags": [
+          "Reservations"
+        ],
+        "x-ms-examples": {
+          "ReservationByBillingAccount": {
+            "$ref": "./examples/ReservationByBillingAccount.json"
+          }
+        },
+        "operationId": "Reservations_GetReservationByBillingAccount",
+        "description": "Gets a reservation for a billing account and reservation order.",
+        "parameters": [
+          {
+            "$ref": "#/parameters/apiVersionParameter"
+          },
+          {
+            "$ref": "#/parameters/billingAccountNameParameter"
+          },
+          {
+            "$ref": "#/parameters/reservationOrderIdParameter"
+          },
+          {
+            "$ref": "#/parameters/reservationIdParameter"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "OK. The request has succeeded.",
+            "schema": {
+              "$ref": "#/definitions/ReservationResponse"
+            }
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "#/definitions/ErrorResponse"
+            }
+          }
+        }
+      }
+    },
+    "/providers/Microsoft.Billing/billingAccounts/{billingAccountName}/billingProfiles/{billingProfileName}/reservationOrders/{reservationOrderId}/reservations/{reservationId}": {
+      "get": {
+        "tags": [
+          "Reservations"
+        ],
+        "x-ms-examples": {
+          "ReservationByBillingProfile": {
+            "$ref": "./examples/ReservationByBillingProfile.json"
+          }
+        },
+        "operationId": "Reservations_GetReservationByBillingProfile",
+        "description": "Gets a reservation order for a billing profile.",
+        "parameters": [
+          {
+            "$ref": "#/parameters/apiVersionParameter"
+          },
+          {
+            "$ref": "#/parameters/billingAccountNameParameter"
+          },
+          {
+            "$ref": "#/parameters/billingProfileNameParameter"
+          },
+          {
+            "$ref": "#/parameters/reservationOrderIdParameter"
+          },
+          {
+            "$ref": "#/parameters/reservationIdParameter"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "OK. The request has succeeded.",
+            "schema": {
+              "$ref": "#/definitions/ReservationResponse"
+            }
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "#/definitions/ErrorResponse"
+            }
+          }
+        }
+      }
+    }
+  },
+  "definitions": {
+    "ErrorDetails": {
+      "description": "The details of the error.",
+      "properties": {
+        "code": {
+          "description": "Error code.",
+          "type": "string",
+          "readOnly": true
+        },
+        "message": {
+          "description": "Error message indicating why the operation failed.",
+          "type": "string",
+          "readOnly": true
+        },
+        "target": {
+          "description": "The target of the particular error.",
+          "type": "string",
+          "readOnly": true
+        },
+        "details": {
+          "description": "The sub details of the error.",
+          "readOnly": true,
+          "$ref": "#/definitions/ErrorSubDetails"
+        }
+      }
+    },
+    "ErrorResponse": {
+      "description": "Error response indicates that the service is not able to process the incoming request. The reason is provided in the error message.",
+      "type": "object",
+      "properties": {
+        "error": {
+          "description": "The details of the error.",
+          "$ref": "#/definitions/ErrorDetails"
+        }
+      }
+    },
+    "ErrorSubDetails": {
+      "type": "array",
+      "items": {
+        "type": "object",
+        "properties": {
+          "code": {
+            "description": "Error code.",
+            "type": "string",
+            "readOnly": true
+          },
+          "message": {
+            "description": "Error message indicating why the operation failed.",
+            "type": "string",
+            "readOnly": true
+          },
+          "target": {
+            "description": "The target of the particular error.",
+            "type": "string",
+            "readOnly": true
+          }
+        }
+      }
+    },
+    "Operation": {
+      "description": "A Billing REST API operation.",
+      "type": "object",
+      "properties": {
+        "name": {
+          "description": "Operation name: {provider}/{resource}/{operation}.",
+          "type": "string",
+          "readOnly": true
+        },
+        "display": {
+          "description": "The object that represents the operation.",
+          "properties": {
+            "provider": {
+              "description": "Service provider: Microsoft.Billing.",
+              "type": "string",
+              "readOnly": true
+            },
+            "resource": {
+              "description": "Resource on which the operation is performed such as invoice and billing subscription.",
+              "type": "string",
+              "readOnly": true
+            },
+            "operation": {
+              "description": "Operation type such as read, write and delete.",
+              "type": "string",
+              "readOnly": true
+            }
+          }
+        }
+      }
+    },
+    "OperationListResult": {
+      "description": "The list of billing operations and a URL link to get the next set of results.",
+      "properties": {
+        "value": {
+          "description": "The list of billing operations supported by the Microsoft.Billing resource provider.",
+          "type": "array",
+          "readOnly": true,
+          "items": {
+            "$ref": "#/definitions/Operation"
+          }
+        },
+        "nextLink": {
+          "description": "URL to get the next set of operation list results if there are any.",
+          "type": "string",
+          "readOnly": true
+        }
+      }
+    },
+    "DisplayProvisioningState": {
+      "type": "string",
+      "description": "Provisioning state shown in UI.",
+      "enum": [
+        "Succeeded",
+        "Expiring",
+        "Expired",
+        "Pending",
+        "Cancelled",
+        "Failed"
+      ],
+      "x-ms-enum": {
+        "name": "DisplayProvisioningState",
+        "modelAsString": true
+      }
+    },
+    "UserFriendlyRenewState": {
+      "type": "string",
+      "description": "User friendly renew state.",
+      "enum": [
+        "On",
+        "Off",
+        "Renewed",
+        "NotRenewed",
+        "NotApplicable"
+      ],
+      "x-ms-enum": {
+        "name": "UserFriendlyRenewState",
+        "modelAsString": true
+      }
+    },
+    "UserFriendlyAppliedScopeType": {
+      "type": "string",
+      "description": "User friendly applied scope type.",
+      "enum": [
+        "None",
+        "Shared",
+        "Single",
+        "ResourceGroup"
+      ],
+      "x-ms-enum": {
+        "name": "UserFriendlyAppliedScopeType",
+        "modelAsString": true
+      }
+    },
+    "ReservationTerm": {
+      "type": "string",
+      "description": "Represent the term of Reservation.",
+      "enum": [
+        "None",
+        "P1Y",
+        "P3Y",
+        "P5Y"
+      ],
+      "x-ms-enum": {
+        "name": "ReservationTerm",
+        "modelAsString": true
+      }
+    },
+    "ReservationOrder": {
+      "type": "object",
+      "x-ms-azure-resource": true,
+      "properties": {
+        "etag": {
+          "type": "integer",
+          "format": "int32"
+        },
+        "id": {
+          "type": "string",
+          "readOnly": true,
+          "description": "Identifier of the reservation order"
+        },
+        "name": {
+          "type": "string",
+          "readOnly": true,
+          "description": "Name of the reservation order"
+        },
+        "properties": {
+          "x-ms-client-flatten": true,
+          "$ref": "#/definitions/ReservationOrderProperties"
+        },
+        "type": {
+          "type": "string",
+          "readOnly": true,
+          "description": "Type of resource. \"Microsoft.Capacity/reservations\""
+        }
+      }
+    },
+    "ReservationOrderProperties": {
+      "description": "Reservation order properties.",
+      "properties": {
+        "productType": {
+          "description": "The product type.",
+          "type": "string",
+          "readOnly": true
+        },
+        "tenantId": {
+          "description": "The id of the tenant in which the product is used.",
+          "type": "string",
+          "readOnly": true
+        },
+        "effectiveDate": {
+          "description": "The date from which the reservation is effective.",
+          "type": "string",
+          "readOnly": true
+        },
+        "requestPurchaseTime": {
+          "description": "The date and time of the purchase.",
+          "type": "string",
+          "readOnly": true
+        },
+        "expiryDate": {
+          "description": "The date when the reservation will expire.",
+          "type": "string",
+          "readOnly": true
+        },
+        "reviewDate": {
+          "description": "The review date.",
+          "type": "string",
+          "readOnly": true
+        },
+        "endDate": {
+          "description": "The date when the reservation will end.",
+          "type": "string",
+          "readOnly": true
+        },
+        "term": {
+          "description": "The term length of the reservation.",
+          "type": "string",
+          "enum": [
+            "None",
+            "P1Y",
+            "P3Y",
+            "P5Y"
+          ],
+          "readOnly": true,
+          "x-ms-enum": {
+            "name": "ReservationTerm",
+            "modelAsString": true
+          }
+        },
+        "reservationName": {
+          "description": "The name of the reservation.",
+          "type": "string",
+          "readOnly": true
+        },
+        "billingScope": {
+          "description": "The billing scope.",
+          "type": "string",
+          "readOnly": true
+        },
+        "billingPlanDetails": {
+          "description": "The details of the billing plan.",
+          "type": "string",
+          "readOnly": true
+        },
+        "state": {
+          "description": "The state of the reservation order.",
+          "type": "string",
+          "readOnly": true
+        },
+        "subState": {
+          "description": "The substate of the reservation order.",
+          "type": "string",
+          "readOnly": true
+        },
+        "reservations": {
+          "description": "The list of reservations in the order.",
+          "type": "array",
+          "readOnly": true,
+          "items": {
+            "type": "string"
+          }
+        },
+        "enrollmentId": {
+          "description": "The enrollment ID.",
+          "type": "string",
+          "readOnly": true
+        },
+        "originalQuantity": {
+          "description": "The original quantity of reservations.",
+          "type": "integer",
+          "format": "int32",
+          "readOnly": true
+        },
+        "extendedErrorInformation": {
+          "description": "The extended error information.",
+          "type": "object",
+          "readOnly": true
+        },
+        "benefitScopeBillingAliasId": {
+          "description": "The benefit scope billing alias ID.",
+          "type": "string",
+          "readOnly": true
+        }
+      }
+    },
+    "Reseller": {
+      "description": "Details of the reseller.",
+      "properties": {
+        "resellerId": {
+          "description": "The MPN ID of the reseller.",
+          "type": "string",
+          "readOnly": true
+        },
+        "description": {
+          "description": "The name of the reseller.",
+          "type": "string",
+          "readOnly": true
+        }
+      }
+    },
+    "SkuName": {
+      "type": "object",
+      "properties": {
+        "name": {
+          "type": "string"
+        }
+      }
+    },
+    "AppliedScopes": {
+      "type": "array",
+      "description": "List of the subscriptions that the benefit will be applied. Do not specify if AppliedScopeType is Shared.",
+      "items": {
+        "type": "string",
+        "minItems": 1,
+        "maxItems": 1
+      }
+    },
+    "AppliedScopeType": {
+      "type": "string",
+      "description": "Type of the Applied Scope.",
+      "enum": [
+        "Single",
+        "Shared"
+      ],
+      "x-ms-enum": {
+        "name": "AppliedScopeType",
+        "modelAsString": true
+      }
+    },
+    "ReservationResponse": {
+      "type": "object",
+      "x-ms-azure-resource": true,
+      "properties": {
+        "location": {
+          "type": "string",
+          "readOnly": true,
+          "description": "The Azure Region where the reserved resource lives."
+        },
+        "etag": {
+          "type": "integer",
+          "format": "int32"
+        },
+        "id": {
+          "type": "string",
+          "readOnly": true,
+          "description": "Identifier of the reservation"
+        },
+        "name": {
+          "type": "string",
+          "readOnly": true,
+          "description": "Name of the reservation"
+        },
+        "sku": {
+          "$ref": "#/definitions/SkuName"
+        },
+        "properties": {
+          "x-ms-client-flatten": true,
+          "$ref": "#/definitions/ReservationProperties"
+        },
+        "type": {
+          "type": "string",
+          "readOnly": true,
+          "description": "Type of resource. \"Microsoft.Capacity/reservationOrders/reservations\""
+        }
+      }
+    },
+    "ReservedResourceType": {
+      "type": "string",
+      "description": "The type of the resource that is being reserved.",
+      "enum": [
+        "VirtualMachines",
+        "SqlDatabases",
+        "SuseLinux",
+        "CosmosDb",
+        "RedHat",
+        "SqlDataWarehouse",
+        "VMwareCloudSimple",
+        "RedHatOsa",
+        "Databricks",
+        "AppService",
+        "ManagedDisk",
+        "BlockBlob",
+        "RedisCache",
+        "AzureDataExplorer",
+        "MySql",
+        "MariaDb",
+        "PostgreSql",
+        "DedicatedHost",
+        "SapHana",
+        "SqlAzureHybridBenefit",
+        "AVS"
+      ],
+      "x-ms-enum": {
+        "name": "ReservedResourceType",
+        "modelAsString": true
+      }
+    },
+    "ReservationProperties": {
+      "type": "object",
+      "properties": {
+        "displayName": {
+          "type": "string",
+          "description": "Friendly name for user to easily identify the reservation"
+        },
+        "appliedScopes": {
+          "$ref": "#/definitions/AppliedScopes"
+        },
+        "appliedScopeType": {
+          "$ref": "#/definitions/AppliedScopeType"
+        },
+        "reservedResourceType": {
+          "$ref": "#/definitions/ReservedResourceType"
+        },
+        "quantity": {
+          "type": "integer",
+          "format": "int32",
+          "description": "Quantity of the SKUs that are part of the Reservation."
+        },
+        "provisioningState": {
+          "type": "string",
+          "description": "Current state of the reservation."
+        },
+        "expiryDate": {
+          "type": "string",
+          "format": "date",
+          "description": "This is the date when the Reservation will expire."
+        },
+        "reviewDate": {
+          "description": "The review date.",
+          "type": "string",
+          "readOnly": true
+        },
+        "provisioningSubState": {
+          "type": "string",
+          "description": "Current sub state of the reservation."
+        },
+        "displayProvisioningState": {
+          "type": "string",
+          "description": "Provisioning state shown in UI.",
+          "enum": [
+            "Succeeded",
+            "Expiring",
+            "Expired",
+            "Pending",
+            "Cancelled",
+            "Failed"
+          ],
+          "readOnly": true,
+          "x-ms-enum": {
+            "name": "DisplayProvisioningState",
+            "modelAsString": true
+          }
+        },
+        "userFriendlyRenewState": {
+          "type": "string",
+          "description": "User friendly renew state.",
+          "enum": [
+            "On",
+            "Off",
+            "Renewed",
+            "NotRenewed",
+            "NotApplicable"
+          ],
+          "readOnly": true,
+          "x-ms-enum": {
+            "name": "UserFriendlyRenewState",
+            "modelAsString": true
+          }
+        },
+        "userFriendlyAppliedScopeType": {
+          "type": "string",
+          "description": "User friendly applied scope type.",
+          "enum": [
+            "None",
+            "Shared",
+            "Single",
+            "ResourceGroup"
+          ],
+          "readOnly": true,
+          "x-ms-enum": {
+            "name": "UserFriendlyAppliedScopeType",
+            "modelAsString": true
+          }
+        },
+        "effectiveDateTime": {
+          "type": "string",
+          "format": "date-time",
+          "description": "DateTime of the Reservation starting when this version is effective from."
+        },
+        "skuDescription": {
+          "type": "string",
+          "description": "SKU description."
+        },
+        "term": {
+          "description": "The term length of the reservation.",
+          "type": "string",
+          "enum": [
+            "None",
+            "P1Y",
+            "P3Y",
+            "P5Y"
+          ],
+          "readOnly": true,
+          "x-ms-enum": {
+            "name": "ReservationTerm",
+            "modelAsString": true
+          }
+        },
+        "renew": {
+          "type": "boolean",
+          "description": "Is reservation set to auto-renew."
+        },
+        "renewSource": {
+          "type": "string",
+          "description": "Reservation Id of the reservation from which this reservation is renewed."
+        },
+        "utilization": {
+          "$ref": "#/definitions/Utilization"
+        }
+      }
+    },
+    "UtilizationAggregate": {
+      "description": "Aggregate utilization data.",
+      "properties": {
+        "grain": {
+          "readOnly": true,
+          "type": "number",
+          "description": "Grain value of the aggregate data."
+        },
+        "grainUnit": {
+          "readOnly": true,
+          "type": "string",
+          "description": "Unit of the grain value."
+        },
+        "value": {
+          "readOnly": true,
+          "type": "number",
+          "description": "Utilization value."
+        },
+        "valueUnit": {
+          "readOnly": true,
+          "type": "string",
+          "description": "Unit of the utilization value."
+        }
+      }
+    },
+    "Utilization": {
+      "description": "Utilization data for the reservation.",
+      "properties": {
+        "trend": {
+          "readOnly": true,
+          "type": "string",
+          "description": "Represents the 7-day trend for a reservation"
+        },
+        "aggregates": {
+          "description": "The list of utilization aggregates.",
+          "type": "array",
+          "readOnly": true,
+          "items": {
+            "$ref": "#/definitions/UtilizationAggregate"
+          }
+        }
+      }
+    }
+  },
+  "parameters": {
+    "apiVersionParameter": {
+      "name": "api-version",
+      "in": "query",
+      "required": true,
+      "type": "string",
+      "description": "The version of the API to be used with the client request. The current version is 2020-11-01-preview."
+    },
+    "billingAccountNameParameter": {
+      "name": "billingAccountName",
+      "in": "path",
+      "description": "The ID that uniquely identifies a billing account.",
+      "required": true,
+      "type": "string",
+      "x-ms-parameter-location": "method"
+    },
+    "billingProfileNameParameter": {
+      "name": "billingProfileName",
+      "in": "path",
+      "description": "The ID that uniquely identifies a billing profile.",
+      "required": true,
+      "type": "string",
+      "x-ms-parameter-location": "method"
+    },
+    "reservationOrderIdParameter": {
+      "name": "reservationOrderId",
+      "x-ms-parameter-location": "method",
+      "in": "path",
+      "required": true,
+      "type": "string",
+      "description": "Order Id of the reservation"
+    },
+    "reservationIdParameter": {
+      "name": "reservationId",
+      "x-ms-parameter-location": "method",
+      "in": "path",
+      "required": true,
+      "type": "string",
+      "description": "Reservation Id of the reservation"
+    }
+  },
+  "security": [
+    {
+      "azure_auth": [
+        "user_impersonation"
+      ]
+    }
+  ],
+  "securityDefinitions": {
+    "azure_auth": {
+      "type": "oauth2",
+      "authorizationUrl": "https://login.microsoftonline.com/common/oauth2/authorize",
+      "flow": "implicit",
+      "description": "Azure Active Directory OAuth2 Flow.",
+      "scopes": {
+        "user_impersonation": "impersonate your user account"
+      }
+    }
+  }
+}
diff --git a/specification/billing/resource-manager/readme.azureresourceschema.md b/specification/billing/resource-manager/readme.azureresourceschema.md
index e7e163b7b60e..65ca37559915 100644
--- a/specification/billing/resource-manager/readme.azureresourceschema.md
+++ b/specification/billing/resource-manager/readme.azureresourceschema.md
@@ -7,6 +7,7 @@ These settings apply only when `--azureresourceschema` is specified on the comma
 ``` yaml $(azureresourceschema) && $(multiapi)
 batch:
   - tag: schema-billing-2020-05-01
+  - tag: schema-billing-2020-11-01-preview
   - tag: schema-billing-2019-10-01-preview
   - tag: schema-billing-2018-11-01-preview
   - tag: schema-billing-2018-03-01-preview
@@ -28,6 +29,17 @@ input-file:
 
 ```
 
+### Tag: schema-billing-2020-11-01-preview and azureresourceschema
+
+``` yaml $(tag) == 'schema-billing-2020-11-01-preview' && $(azureresourceschema)
+output-folder: $(azureresourceschema-folder)/schemas
+
+# all the input files in this apiVersion
+input-file:
+  - Microsoft.Billing/preview/2020-11-01-preview/reservations.json
+
+```
+
 ### Tag: schema-billing-2019-10-01-preview and azureresourceschema
 
 ``` yaml $(tag) == 'schema-billing-2019-10-01-preview' && $(azureresourceschema)
diff --git a/specification/billing/resource-manager/readme.md b/specification/billing/resource-manager/readme.md
index 133322e3dbd8..3b75cbcf80e2 100644
--- a/specification/billing/resource-manager/readme.md
+++ b/specification/billing/resource-manager/readme.md
@@ -39,6 +39,15 @@ input-file:
 - Microsoft.Billing/preview/2018-03-01-preview/billingV2.json
 ```
 
+### Tag: package-2020-11-preview
+
+These settings apply only when `--tag=package-2020-11-preview` is specified on the command line.
+
+``` yaml $(tag) == 'package-2020-11-preview'
+input-file:
+- Microsoft.Billing/preview/2020-11-01-preview/reservations.json
+```
+
 ### Tag: package-2019-10-preview
 
 These settings apply only when `--tag=package-2019-10-preview` is specified on the command line.