diff --git a/lib/services/authorizationManagement/lib/models/index.d.ts b/lib/services/authorizationManagement/lib/models/index.d.ts
index f92f1ab7c6..55bf4f447a 100644
--- a/lib/services/authorizationManagement/lib/models/index.d.ts
+++ b/lib/services/authorizationManagement/lib/models/index.d.ts
@@ -161,6 +161,12 @@ export interface RoleAssignment {
    * The principal ID.
    */
   principalId?: string;
+  /**
+   * The principal type of the assigned principal ID. Possible values include: 'User', 'Group',
+   * 'ServicePrincipal', 'Unknown', 'DirectoryRoleTemplate', 'ForeignGroup', 'Application', 'MSI',
+   * 'DirectoryObjectOrGroup', 'Everyone'
+   */
+  principalType?: string;
   /**
    * The Delegation flag for the roleassignment
    */
diff --git a/lib/services/authorizationManagement/lib/models/roleAssignment.js b/lib/services/authorizationManagement/lib/models/roleAssignment.js
index 4defec9cbc..7923f4899d 100644
--- a/lib/services/authorizationManagement/lib/models/roleAssignment.js
+++ b/lib/services/authorizationManagement/lib/models/roleAssignment.js
@@ -23,6 +23,10 @@ class RoleAssignment {
    * @property {string} [scope] The role assignment scope.
    * @property {string} [roleDefinitionId] The role definition ID.
    * @property {string} [principalId] The principal ID.
+   * @property {string} [principalType] The principal type of the assigned
+   * principal ID. Possible values include: 'User', 'Group',
+   * 'ServicePrincipal', 'Unknown', 'DirectoryRoleTemplate', 'ForeignGroup',
+   * 'Application', 'MSI', 'DirectoryObjectOrGroup', 'Everyone'
    * @property {boolean} [canDelegate] The Delegation flag for the
    * roleassignment
    */
@@ -88,6 +92,13 @@ class RoleAssignment {
               name: 'String'
             }
           },
+          principalType: {
+            required: false,
+            serializedName: 'properties.principalType',
+            type: {
+              name: 'String'
+            }
+          },
           canDelegate: {
             required: false,
             serializedName: 'properties.canDelegate',