Adding a note on tenant permissions related on the ALM APIs

Author: VesaJuvonen

docs/apis/alm-api-for-spfx-add-ins.md

@@ -26,6 +26,9 @@ ALM APIs can be used to perform exactly the same operations that are available f
 
 ALM APIs are natively provided by using REST APIs, but there are additional CSOM extensions, PowerShell cmdlets, and the cross-platform Office 365 CLI available through SharePoint PnP Community channels.
 
+> [!IMPORTANT]
+> Tenant-scoped permissions which require [tenant administrative approval](https://docs.microsoft.com/en-us/sharepoint/dev/solution-guidance/how-to-provide-add-in-app-only-tenant-administrative-permissions-in-sharepoint-online) are not supported with the ALM APIs.
+
 ## REST API
 
 > [!TIP]