Merge pull request #248431 from owinoakelo/owinoakelo-patch-1-3

Provisioning multi-valued directory extension attributes is not supported.

Author: prmerger-automator[bot]

articles/active-directory/app-provisioning/customize-application-attributes.md

@@ -123,7 +123,7 @@ Applications and systems that support customization of the attribute list includ
 > Editing the list of supported attributes is only recommended for administrators who have customized the schema of their applications and systems, and have first-hand knowledge of how their custom attributes have been defined or if a source attribute isn't automatically displayed in the Azure portal UI. This sometimes requires familiarity with the APIs and developer tools provided by an application or system. The ability to edit the list of supported attributes is locked down by default, but customers can enable the capability by navigating to the following URL: https://portal.azure.com/?Microsoft_AAD_Connect_Provisioning_forceSchemaEditorEnabled=true . You can then navigate to your application to view the [attribute list](#editing-the-list-of-supported-attributes). 
 
 > [!NOTE]
-> When a directory extension attribute in Azure AD doesn't show up automatically in your attribute mapping drop-down, you can manually add it to the "Azure AD attribute list".  When manually adding Azure AD directory extension attributes to your provisioning app, note that directory extension attribute names are case-sensitive. For example: If you have a directory extension attribute named `extension_53c9e2c0exxxxxxxxxxxxxxxx_acmeCostCenter`, make sure you enter it in the same format as defined in the directory.     
+> When a directory extension attribute in Azure AD doesn't show up automatically in your attribute mapping drop-down, you can manually add it to the "Azure AD attribute list".  When manually adding Azure AD directory extension attributes to your provisioning app, note that directory extension attribute names are case-sensitive. For example: If you have a directory extension attribute named `extension_53c9e2c0exxxxxxxxxxxxxxxx_acmeCostCenter`, make sure you enter it in the same format as defined in the directory. Provisioning multi-valued directory extension attributes is not supported.    
 
 When you're editing the list of supported attributes, the following properties are provided: