diff --git a/specification/web/resource-manager/Microsoft.Web/stable/2020-06-01/CommonDefinitions.json b/specification/web/resource-manager/Microsoft.Web/stable/2020-06-01/CommonDefinitions.json
index 948428d153c3..b8031e339d02 100644
--- a/specification/web/resource-manager/Microsoft.Web/stable/2020-06-01/CommonDefinitions.json
+++ b/specification/web/resource-manager/Microsoft.Web/stable/2020-06-01/CommonDefinitions.json
@@ -1992,6 +1992,14 @@
           "description": "<code>true</code> if HTTP logging is enabled; otherwise, <code>false</code>.",
           "type": "boolean"
         },
+        "acrUseManagedIdentityCreds": {
+          "description": "Flag to use Managed Identity Creds for ACR pull",
+          "type": "boolean"
+        },
+        "acrUserManagedIdentityID": {
+          "description": "If using user managed identity, the user managed identity ClientId",
+          "type": "string"
+        },
         "logsDirectorySizeLimit": {
           "format": "int32",
           "description": "HTTP logs directory size limit.",
diff --git a/specification/web/resource-manager/Microsoft.Web/stable/2020-09-01/CommonDefinitions.json b/specification/web/resource-manager/Microsoft.Web/stable/2020-09-01/CommonDefinitions.json
index 4ee25e9443b6..40c8b845d8c3 100644
--- a/specification/web/resource-manager/Microsoft.Web/stable/2020-09-01/CommonDefinitions.json
+++ b/specification/web/resource-manager/Microsoft.Web/stable/2020-09-01/CommonDefinitions.json
@@ -2000,6 +2000,14 @@
           "description": "<code>true</code> if HTTP logging is enabled; otherwise, <code>false</code>.",
           "type": "boolean"
         },
+        "acrUseManagedIdentityCreds": {
+          "description": "Flag to use Managed Identity Creds for ACR pull",
+          "type": "boolean"
+        },
+        "acrUserManagedIdentityID": {
+          "description": "If using user managed identity, the user managed identity ClientId",
+          "type": "string"
+        },
         "logsDirectorySizeLimit": {
           "format": "int32",
           "description": "HTTP logs directory size limit.",
diff --git a/specification/web/resource-manager/Microsoft.Web/stable/2020-10-01/CommonDefinitions.json b/specification/web/resource-manager/Microsoft.Web/stable/2020-10-01/CommonDefinitions.json
index 5ddb30dc2489..0c601ee64ad6 100644
--- a/specification/web/resource-manager/Microsoft.Web/stable/2020-10-01/CommonDefinitions.json
+++ b/specification/web/resource-manager/Microsoft.Web/stable/2020-10-01/CommonDefinitions.json
@@ -2004,6 +2004,14 @@
           "description": "<code>true</code> if HTTP logging is enabled; otherwise, <code>false</code>.",
           "type": "boolean"
         },
+        "acrUseManagedIdentityCreds": {
+          "description": "Flag to use Managed Identity Creds for ACR pull",
+          "type": "boolean"
+        },
+        "acrUserManagedIdentityID": {
+          "description": "If using user managed identity, the user managed identity ClientId",
+          "type": "string"
+        },
         "logsDirectorySizeLimit": {
           "format": "int32",
           "description": "HTTP logs directory size limit.",
diff --git a/specification/web/resource-manager/Microsoft.Web/stable/2020-12-01/CommonDefinitions.json b/specification/web/resource-manager/Microsoft.Web/stable/2020-12-01/CommonDefinitions.json
index dd7207cdab9a..83b09d4b9d31 100644
--- a/specification/web/resource-manager/Microsoft.Web/stable/2020-12-01/CommonDefinitions.json
+++ b/specification/web/resource-manager/Microsoft.Web/stable/2020-12-01/CommonDefinitions.json
@@ -2434,6 +2434,14 @@
           "description": "<code>true</code> if HTTP logging is enabled; otherwise, <code>false</code>.",
           "type": "boolean"
         },
+        "acrUseManagedIdentityCreds": {
+          "description": "Flag to use Managed Identity Creds for ACR pull",
+          "type": "boolean"
+        },
+        "acrUserManagedIdentityID": {
+          "description": "If using user managed identity, the user managed identity ClientId",
+          "type": "string"
+        },
         "logsDirectorySizeLimit": {
           "format": "int32",
           "description": "HTTP logs directory size limit.",