diff --git a/schemas/2022-08-08/Microsoft.Automation.json b/schemas/2022-08-08/Microsoft.Automation.json
index 005160db60..dc685daf15 100644
--- a/schemas/2022-08-08/Microsoft.Automation.json
+++ b/schemas/2022-08-08/Microsoft.Automation.json
@@ -752,7 +752,7 @@
           "oneOf": [
             {
               "type": "string",
-              "pattern": "^[a-zA-Z]*-*[a-zA-Z0-9]*$"
+              "pattern": "^[a-zA-Z][a-zA-Z-_0-9]*$"
             },
             {
               "$ref": "https://schema.management.azure.com/schemas/common/definitions.json#/definitions/expression"
@@ -1819,7 +1819,7 @@
           "oneOf": [
             {
               "type": "string",
-              "pattern": "^[a-zA-Z]*-*[a-zA-Z0-9]*$"
+              "pattern": "^[a-zA-Z][a-zA-Z-_0-9]*$"
             },
             {
               "$ref": "https://schema.management.azure.com/schemas/common/definitions.json#/definitions/expression"