update

Author: neerja581

specification/keyvault/resource-manager/Microsoft.KeyVault/KeyVault/models.tsp

@@ -588,7 +588,20 @@ enum KeyVaultNameUnavailableReason {
 /**
  * SKU of the managed HSM Pool
  */
-union ManagedHsmSkuName {
+#suppress "@azure-tools/typespec-azure-core/no-enum" "Closed enum retained unchanged for already-released GA API versions 2025-05-01 and 2026-02-01 per Azure Breaking Changes Board guidance; superseded by the extensible union ManagedHsmSkuNameV2 starting in 2026-03-01-preview."
+enum ManagedHsmSkuName {
+  Standard_B1,
+  Custom_B32,
+  Custom_B6,
+  Custom_C42,
+  Custom_C10,
+}
+
+/**
+ * SKU of the managed HSM Pool
+ */
+@Versioning.added(KeyVault.Versions.v2026_03_01_preview)
+union ManagedHsmSkuNameV2 {
   string,
 
   /** Standard_B1 SKU */
@@ -1916,7 +1929,8 @@ model ManagedHsmSku {
   /**
    * SKU of the managed HSM Pool
    */
-  name: ManagedHsmSkuName;
+  @Versioning.typeChangedFrom(KeyVault.Versions.v2026_03_01_preview, ManagedHsmSkuName)
+  name: ManagedHsmSkuNameV2;
 }
 
 /**

specification/keyvault/resource-manager/Microsoft.KeyVault/KeyVault/preview/2026-03-01-preview/openapi.json

@@ -4611,7 +4611,7 @@
           "description": "SKU Family of the managed HSM Pool"
         },
         "name": {
-          "$ref": "#/definitions/ManagedHsmSkuName",
+          "$ref": "#/definitions/ManagedHsmSkuNameV2",
           "description": "SKU of the managed HSM Pool"
         }
       },
@@ -4642,7 +4642,7 @@
         ]
       }
     },
-    "ManagedHsmSkuName": {
+    "ManagedHsmSkuNameV2": {
       "type": "string",
       "description": "SKU of the managed HSM Pool",
       "enum": [
@@ -4653,7 +4653,7 @@
         "Custom_C10"
       ],
       "x-ms-enum": {
-        "name": "ManagedHsmSkuName",
+        "name": "ManagedHsmSkuNameV2",
         "modelAsString": true,
         "values": [
           {

specification/keyvault/resource-manager/Microsoft.KeyVault/KeyVault/stable/2025-05-01/openapi.json

@@ -4654,34 +4654,7 @@
       ],
       "x-ms-enum": {
         "name": "ManagedHsmSkuName",
-        "modelAsString": true,
-        "values": [
-          {
-            "name": "Standard_B1",
-            "value": "Standard_B1",
-            "description": "Standard_B1 SKU"
-          },
-          {
-            "name": "Custom_B32",
-            "value": "Custom_B32",
-            "description": "Custom_B32 SKU"
-          },
-          {
-            "name": "Custom_B6",
-            "value": "Custom_B6",
-            "description": "Custom_B6 SKU"
-          },
-          {
-            "name": "Custom_C42",
-            "value": "Custom_C42",
-            "description": "Custom_C42 SKU"
-          },
-          {
-            "name": "Custom_C10",
-            "value": "Custom_C10",
-            "description": "Custom_C10 SKU"
-          }
-        ]
+        "modelAsString": false
       }
     },
     "ManagedHsmTrigger": {

specification/keyvault/resource-manager/Microsoft.KeyVault/KeyVault/stable/2026-02-01/openapi.json

@@ -4654,34 +4654,7 @@
       ],
       "x-ms-enum": {
         "name": "ManagedHsmSkuName",
-        "modelAsString": true,
-        "values": [
-          {
-            "name": "Standard_B1",
-            "value": "Standard_B1",
-            "description": "Standard_B1 SKU"
-          },
-          {
-            "name": "Custom_B32",
-            "value": "Custom_B32",
-            "description": "Custom_B32 SKU"
-          },
-          {
-            "name": "Custom_B6",
-            "value": "Custom_B6",
-            "description": "Custom_B6 SKU"
-          },
-          {
-            "name": "Custom_C42",
-            "value": "Custom_C42",
-            "description": "Custom_C42 SKU"
-          },
-          {
-            "name": "Custom_C10",
-            "value": "Custom_C10",
-            "description": "Custom_C10 SKU"
-          }
-        ]
+        "modelAsString": false
       }
     },
     "ManagedHsmTrigger": {