diff --git a/specification/network/resource-manager/Microsoft.Network/stable/2021-01-01/examples/VirtualNetworkPeeringCreate.json b/specification/network/resource-manager/Microsoft.Network/stable/2021-01-01/examples/VirtualNetworkPeeringCreate.json
index ad935433c3cf..d68bae9b4f5a 100644
--- a/specification/network/resource-manager/Microsoft.Network/stable/2021-01-01/examples/VirtualNetworkPeeringCreate.json
+++ b/specification/network/resource-manager/Microsoft.Network/stable/2021-01-01/examples/VirtualNetworkPeeringCreate.json
@@ -35,11 +35,17 @@
               "12.0.0.0/8"
             ]
           },
+          "remoteVirtualNetworkAddressSpace": {
+            "addressPrefixes": [
+              "12.0.0.0/8"
+            ]
+          },
           "remoteBgpCommunities": {
             "virtualNetworkCommunity": "12076:20002",
             "regionalCommunity": "12076:50004"
           },
           "peeringState": "Initiated",
+          "peeringSyncLevel": "FullyInSync",
           "provisioningState": "Succeeded"
         }
       }
@@ -61,11 +67,17 @@
               "12.0.0.0/8"
             ]
           },
+          "remoteVirtualNetworkAddressSpace": {
+            "addressPrefixes": [
+              "12.0.0.0/8"
+            ]
+          },
           "remoteBgpCommunities": {
             "virtualNetworkCommunity": "12076:20002",
             "regionalCommunity": "12076:50004"
           },
           "peeringState": "Initiated",
+          "peeringSyncLevel": "FullyInSync",
           "provisioningState": "Succeeded"
         }
       }
diff --git a/specification/network/resource-manager/Microsoft.Network/stable/2021-01-01/examples/VirtualNetworkPeeringGet.json b/specification/network/resource-manager/Microsoft.Network/stable/2021-01-01/examples/VirtualNetworkPeeringGet.json
index 3b0aff5c4aee..27b13fd5ca68 100644
--- a/specification/network/resource-manager/Microsoft.Network/stable/2021-01-01/examples/VirtualNetworkPeeringGet.json
+++ b/specification/network/resource-manager/Microsoft.Network/stable/2021-01-01/examples/VirtualNetworkPeeringGet.json
@@ -24,11 +24,17 @@
               "12.0.0.0/8"
             ]
           },
+          "remoteVirtualNetworkAddressSpace": {
+            "addressPrefixes": [
+              "12.0.0.0/8"
+            ]
+          },
           "remoteBgpCommunities": {
             "virtualNetworkCommunity": "12076:20002",
             "regionalCommunity": "12076:50004"
           },
           "peeringState": "Initiated",
+          "peeringSyncLevel": "FullyInSync",
           "provisioningState": "Succeeded"
         }
       }
diff --git a/specification/network/resource-manager/Microsoft.Network/stable/2021-01-01/examples/VirtualNetworkPeeringList.json b/specification/network/resource-manager/Microsoft.Network/stable/2021-01-01/examples/VirtualNetworkPeeringList.json
index f5f2d19d15f4..4756d026bc34 100644
--- a/specification/network/resource-manager/Microsoft.Network/stable/2021-01-01/examples/VirtualNetworkPeeringList.json
+++ b/specification/network/resource-manager/Microsoft.Network/stable/2021-01-01/examples/VirtualNetworkPeeringList.json
@@ -25,11 +25,17 @@
                   "12.0.0.0/8"
                 ]
               },
+              "remoteVirtualNetworkAddressSpace": {
+                "addressPrefixes": [
+                  "12.0.0.0/8"
+                ]
+              },
               "remoteBgpCommunities": {
                 "virtualNetworkCommunity": "12076:20002",
                 "regionalCommunity": "12076:50004"
               },
               "peeringState": "Initiated",
+              "peeringSyncLevel": "FullyInSync",
               "provisioningState": "Succeeded"
             }
           },
@@ -49,11 +55,17 @@
                   "13.0.0.0/8"
                 ]
               },
+              "remoteVirtualNetworkAddressSpace": {
+                "addressPrefixes": [
+                  "13.0.0.0/8"
+                ]
+              },
               "remoteBgpCommunities": {
                 "virtualNetworkCommunity": "12076:20003",
                 "regionalCommunity": "12076:50004"
               },
               "peeringState": "Initiated",
+              "peeringSyncLevel": "FullyInSync",
               "provisioningState": "Succeeded"
             }
           }
diff --git a/specification/network/resource-manager/Microsoft.Network/stable/2021-01-01/examples/VirtualNetworkPeeringSync.json b/specification/network/resource-manager/Microsoft.Network/stable/2021-01-01/examples/VirtualNetworkPeeringSync.json
new file mode 100644
index 000000000000..d68bae9b4f5a
--- /dev/null
+++ b/specification/network/resource-manager/Microsoft.Network/stable/2021-01-01/examples/VirtualNetworkPeeringSync.json
@@ -0,0 +1,86 @@
+{
+  "parameters": {
+    "virtualNetworkPeeringName": "peer",
+    "virtualNetworkName": "vnet1",
+    "resourceGroupName": "peerTest",
+    "api-version": "2021-01-01",
+    "subscriptionId": "subid",
+    "VirtualNetworkPeeringParameters": {
+      "properties": {
+        "allowVirtualNetworkAccess": true,
+        "allowForwardedTraffic": true,
+        "allowGatewayTransit": false,
+        "useRemoteGateways": false,
+        "remoteVirtualNetwork": {
+          "id": "/subscriptions/subid/resourceGroups/peerTest/providers/Microsoft.Network/virtualNetworks/vnet2"
+        }
+      }
+    }
+  },
+  "responses": {
+    "200": {
+      "body": {
+        "id": "/subscriptions/subid/resourceGroups/peerTest/providers/Microsoft.Network/virtualNetworks/vnet1/virtualNetworkPeerings/peer",
+        "name": "peer",
+        "properties": {
+          "allowVirtualNetworkAccess": true,
+          "allowForwardedTraffic": true,
+          "allowGatewayTransit": false,
+          "useRemoteGateways": false,
+          "remoteVirtualNetwork": {
+            "id": "/subscriptions/subid/resourceGroups/peerTest/providers/Microsoft.Network/virtualNetworks/vnet2"
+          },
+          "remoteAddressSpace": {
+            "addressPrefixes": [
+              "12.0.0.0/8"
+            ]
+          },
+          "remoteVirtualNetworkAddressSpace": {
+            "addressPrefixes": [
+              "12.0.0.0/8"
+            ]
+          },
+          "remoteBgpCommunities": {
+            "virtualNetworkCommunity": "12076:20002",
+            "regionalCommunity": "12076:50004"
+          },
+          "peeringState": "Initiated",
+          "peeringSyncLevel": "FullyInSync",
+          "provisioningState": "Succeeded"
+        }
+      }
+    },
+    "201": {
+      "body": {
+        "id": "/subscriptions/subid/resourceGroups/peerTest/providers/Microsoft.Network/virtualNetworks/vnet1/virtualNetworkPeerings/peer",
+        "name": "peer",
+        "properties": {
+          "allowVirtualNetworkAccess": true,
+          "allowForwardedTraffic": true,
+          "allowGatewayTransit": false,
+          "useRemoteGateways": false,
+          "remoteVirtualNetwork": {
+            "id": "/subscriptions/subid/resourceGroups/peerTest/providers/Microsoft.Network/virtualNetworks/vnet2"
+          },
+          "remoteAddressSpace": {
+            "addressPrefixes": [
+              "12.0.0.0/8"
+            ]
+          },
+          "remoteVirtualNetworkAddressSpace": {
+            "addressPrefixes": [
+              "12.0.0.0/8"
+            ]
+          },
+          "remoteBgpCommunities": {
+            "virtualNetworkCommunity": "12076:20002",
+            "regionalCommunity": "12076:50004"
+          },
+          "peeringState": "Initiated",
+          "peeringSyncLevel": "FullyInSync",
+          "provisioningState": "Succeeded"
+        }
+      }
+    }
+  }
+}
diff --git a/specification/network/resource-manager/Microsoft.Network/stable/2021-01-01/virtualNetwork.json b/specification/network/resource-manager/Microsoft.Network/stable/2021-01-01/virtualNetwork.json
index a0175af34563..23185bf1f9b1 100644
--- a/specification/network/resource-manager/Microsoft.Network/stable/2021-01-01/virtualNetwork.json
+++ b/specification/network/resource-manager/Microsoft.Network/stable/2021-01-01/virtualNetwork.json
@@ -1038,6 +1038,13 @@
             },
             "description": "Parameters supplied to the create or update virtual network peering operation."
           },
+          {
+            "name": "syncRemoteAddressSpace",
+            "in": "query",
+            "required": false,
+            "type": "string",
+            "description": "Parameter indicates the intention to sync the peering with the current address space on the remote vNet after it's updated."
+          },
           {
             "$ref": "./network.json#/parameters/ApiVersionParameter"
           },
@@ -1068,6 +1075,9 @@
         "x-ms-examples": {
           "Create peering": {
             "$ref": "./examples/VirtualNetworkPeeringCreate.json"
+          },
+          "Sync Peering": {
+            "$ref": "./examples/VirtualNetworkPeeringSync.json"
           }
         },
         "x-ms-long-running-operation": true,
@@ -1550,7 +1560,11 @@
         },
         "remoteAddressSpace": {
           "$ref": "#/definitions/AddressSpace",
-          "description": "The reference to the remote virtual network address space."
+          "description": "The reference to the address space peered with the remote virtual network."
+        },
+        "remoteVirtualNetworkAddressSpace": {
+          "$ref": "#/definitions/AddressSpace",
+          "description": "The reference to the current address space of the remote virtual network."
         },
         "remoteBgpCommunities": {
           "$ref": "#/definitions/VirtualNetworkBgpCommunities",
@@ -1570,6 +1584,20 @@
             "modelAsString": true
           }
         },
+        "peeringSyncLevel": {
+          "type": "string",
+          "description": "The peering sync status of the virtual network peering.",
+          "enum": [
+            "FullyInSync",
+            "RemoteNotInSync",
+            "LocalNotInSync",
+            "LocalAndRemoteNotInSync"
+          ],
+          "x-ms-enum": {
+            "name": "VirtualNetworkPeeringLevel",
+            "modelAsString": true
+          }
+        },
         "provisioningState": {
           "readOnly": true,
           "$ref": "./network.json#/definitions/ProvisioningState",