diff --git a/profiles/latest/web/mgmt/web/models.go b/profiles/latest/web/mgmt/web/models.go
index f0e47dfad48c..0120488714d2 100644
--- a/profiles/latest/web/mgmt/web/models.go
+++ b/profiles/latest/web/mgmt/web/models.go
@@ -931,6 +931,7 @@ type MSDeployLogProperties = original.MSDeployLogProperties
 type MSDeployStatus = original.MSDeployStatus
 type MSDeployStatusProperties = original.MSDeployStatusProperties
 type ManagedServiceIdentity = original.ManagedServiceIdentity
+type ManagedServiceIdentityUserAssignedIdentitiesValue = original.ManagedServiceIdentityUserAssignedIdentitiesValue
 type MetricAvailabilily = original.MetricAvailabilily
 type MetricAvailability = original.MetricAvailability
 type MetricDefinition = original.MetricDefinition
diff --git a/profiles/preview/web/mgmt/web/models.go b/profiles/preview/web/mgmt/web/models.go
index 6af38f210a64..84ac2b431522 100644
--- a/profiles/preview/web/mgmt/web/models.go
+++ b/profiles/preview/web/mgmt/web/models.go
@@ -931,6 +931,7 @@ type MSDeployLogProperties = original.MSDeployLogProperties
 type MSDeployStatus = original.MSDeployStatus
 type MSDeployStatusProperties = original.MSDeployStatusProperties
 type ManagedServiceIdentity = original.ManagedServiceIdentity
+type ManagedServiceIdentityUserAssignedIdentitiesValue = original.ManagedServiceIdentityUserAssignedIdentitiesValue
 type MetricAvailabilily = original.MetricAvailabilily
 type MetricAvailability = original.MetricAvailability
 type MetricDefinition = original.MetricDefinition
diff --git a/services/web/mgmt/2018-02-01/web/models.go b/services/web/mgmt/2018-02-01/web/models.go
index d5af9ab4b30d..bdca052f48d4 100644
--- a/services/web/mgmt/2018-02-01/web/models.go
+++ b/services/web/mgmt/2018-02-01/web/models.go
@@ -12258,8 +12258,34 @@ type ManagedServiceIdentity struct {
 	TenantID *string `json:"tenantId,omitempty"`
 	// PrincipalID - Principal Id of managed service identity.
 	PrincipalID *string `json:"principalId,omitempty"`
-	// IdentityIds - Array of UserAssigned managed service identities.
-	IdentityIds *[]string `json:"identityIds,omitempty"`
+	// UserAssignedIdentities - The list of user assigned identities associated with the resource. The user identity dictionary key references will be ARM resource ids in the form: '/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.ManagedIdentity/userAssignedIdentities/{identityName}
+	UserAssignedIdentities map[string]*ManagedServiceIdentityUserAssignedIdentitiesValue `json:"userAssignedIdentities"`
+}
+
+// MarshalJSON is the custom marshaler for ManagedServiceIdentity.
+func (msi ManagedServiceIdentity) MarshalJSON() ([]byte, error) {
+	objectMap := make(map[string]interface{})
+	if msi.Type != "" {
+		objectMap["type"] = msi.Type
+	}
+	if msi.TenantID != nil {
+		objectMap["tenantId"] = msi.TenantID
+	}
+	if msi.PrincipalID != nil {
+		objectMap["principalId"] = msi.PrincipalID
+	}
+	if msi.UserAssignedIdentities != nil {
+		objectMap["userAssignedIdentities"] = msi.UserAssignedIdentities
+	}
+	return json.Marshal(objectMap)
+}
+
+// ManagedServiceIdentityUserAssignedIdentitiesValue ...
+type ManagedServiceIdentityUserAssignedIdentitiesValue struct {
+	// PrincipalID - Principal Id of user assigned identity
+	PrincipalID *string `json:"principalId,omitempty"`
+	// ClientID - Client Id of user assigned identity
+	ClientID *string `json:"clientId,omitempty"`
 }
 
 // MetricAvailabilily metric availability and retention.