diff --git a/schemas/2021-10-18-preview/Microsoft.VideoIndexer.json b/schemas/2021-10-18-preview/Microsoft.VideoIndexer.json
index d157786015..5cd69d4051 100644
--- a/schemas/2021-10-18-preview/Microsoft.VideoIndexer.json
+++ b/schemas/2021-10-18-preview/Microsoft.VideoIndexer.json
@@ -90,7 +90,8 @@
       "properties": {
         "accountId": {
           "type": "string",
-          "description": "The account's data-plane ID"
+          "default": "00000000-0000-0000-0000-000000000000",
+          "description": "The account's data-plane ID. This can be set only when connecting an existing classic account"
         },
         "mediaServices": {
           "oneOf": [
diff --git a/schemas/2021-10-27-preview/Microsoft.VideoIndexer.json b/schemas/2021-10-27-preview/Microsoft.VideoIndexer.json
index 672b616229..b82549a9a7 100644
--- a/schemas/2021-10-27-preview/Microsoft.VideoIndexer.json
+++ b/schemas/2021-10-27-preview/Microsoft.VideoIndexer.json
@@ -90,7 +90,8 @@
       "properties": {
         "accountId": {
           "type": "string",
-          "description": "The account's data-plane ID"
+          "default": "00000000-0000-0000-0000-000000000000",
+          "description": "The account's data-plane ID. This can be set only when connecting an existing classic account"
         },
         "mediaServices": {
           "oneOf": [
diff --git a/schemas/2021-11-10-preview/Microsoft.VideoIndexer.json b/schemas/2021-11-10-preview/Microsoft.VideoIndexer.json
index 704fc4a62c..67eeece440 100644
--- a/schemas/2021-11-10-preview/Microsoft.VideoIndexer.json
+++ b/schemas/2021-11-10-preview/Microsoft.VideoIndexer.json
@@ -90,7 +90,8 @@
       "properties": {
         "accountId": {
           "type": "string",
-          "description": "The account's data-plane ID"
+          "default": "00000000-0000-0000-0000-000000000000",
+          "description": "The account's data-plane ID. This can be set only when connecting an existing classic account"
         },
         "mediaServices": {
           "oneOf": [
diff --git a/schemas/2022-04-13-preview/Microsoft.VideoIndexer.json b/schemas/2022-04-13-preview/Microsoft.VideoIndexer.json
index 55927b7da9..97761d289d 100644
--- a/schemas/2022-04-13-preview/Microsoft.VideoIndexer.json
+++ b/schemas/2022-04-13-preview/Microsoft.VideoIndexer.json
@@ -91,7 +91,8 @@
       "properties": {
         "accountId": {
           "type": "string",
-          "description": "The account's data-plane ID"
+          "default": "00000000-0000-0000-0000-000000000000",
+          "description": "The account's data-plane ID. This can be set only when connecting an existing classic account"
         },
         "mediaServices": {
           "oneOf": [