Merge pull request #166326 from dimadhus/dimadhus/addtrailingspacelimitationstodocs

Add user name leading trailing space constraints in documents.

Author: PRMerger17

articles/mysql/howto-configure-sign-in-azure-ad-authentication.md

@@ -171,9 +171,9 @@ Example:
 ```sql
 CREATE AADUSER '[email protected]' as 'userDefinedShortName'; 
 ```
-
 > [!NOTE]
-> Authenticating a user through Azure AD does not give the user any permissions to access objects within the Azure Database for MySQL database. You must grant the user the required permissions manually.
+> 1. MySQL ignores leading and trailing spaces so user name should not have any leading or trailing spaces. 
+> 2. Authenticating a user through Azure AD does not give the user any permissions to access objects within the Azure Database for MySQL database. You must grant the user the required permissions manually.
 
 ## Creating Azure AD groups in Azure Database for MySQL