Merge pull request #109338 from tfitzmac/0327names

add sql admin

Author: PRMerger8

articles/azure-resource-manager/management/resource-name-rules.md

@@ -2,7 +2,7 @@
 title: Resource naming restrictions
 description: Shows the rules and restrictions for naming Azure resources.
 ms.topic: conceptual
-ms.date: 03/26/2020
+ms.date: 03/27/2020
 ---
 
 # Naming rules and restrictions for Azure resources
@@ -618,6 +618,7 @@ In the following tables, the term alphanumeric refers to:
 > | --- | --- | --- | --- |
 > | managedInstances | global | 1-63 | Lowercase letters, numbers, and hyphens.<br><br>Can't start or end with hyphen. |
 > | servers | global | 1-63 | Lowercase letters, numbers, and hyphens.<br><br>Can't start or end with hyphen. |
+> | servers / administrators | server |  | Must be `ActiveDirectory`. |
 > | servers / databases | server | 1-128 | Can't use:<br>`<>*%&:\/?`<br><br>Can't end with period or space. |
 > | servers / databases / syncGroups | database | 1-150 | Alphanumerics, hyphens, and underscores. |
 > | servers / elasticPools | server | 1-128 | Can't use:<br>`<>*%&:\/?`<br><br>Can't end with period or space. |