diff --git a/specification/apimanagement/resource-manager/Microsoft.ApiManagement/preview/2018-06-01-preview/apimusers.json b/specification/apimanagement/resource-manager/Microsoft.ApiManagement/preview/2018-06-01-preview/apimusers.json
index 2fbd739e4896..1207811dfd69 100644
--- a/specification/apimanagement/resource-manager/Microsoft.ApiManagement/preview/2018-06-01-preview/apimusers.json
+++ b/specification/apimanagement/resource-manager/Microsoft.ApiManagement/preview/2018-06-01-preview/apimusers.json
@@ -822,7 +822,6 @@
           "description": "Optional note about a user set by the administrator."
         },
         "identities": {
-          "readOnly": true,
           "type": "array",
           "items": {
             "$ref": "#/definitions/UserIdentityContract"
diff --git a/specification/apimanagement/resource-manager/Microsoft.ApiManagement/stable/2018-01-01/apimusers.json b/specification/apimanagement/resource-manager/Microsoft.ApiManagement/stable/2018-01-01/apimusers.json
index e52d1a35cfde..5da0e9deb3c8 100644
--- a/specification/apimanagement/resource-manager/Microsoft.ApiManagement/stable/2018-01-01/apimusers.json
+++ b/specification/apimanagement/resource-manager/Microsoft.ApiManagement/stable/2018-01-01/apimusers.json
@@ -822,7 +822,6 @@
           "description": "Optional note about a user set by the administrator."
         },
         "identities": {
-          "readOnly": true,
           "type": "array",
           "items": {
             "$ref": "#/definitions/UserIdentityContract"