Task 11
You need to restrict external Teams communication for both calling and personal chat to only organizational users that use the microsoft.com domain.
Task 7
You need to prevent users from deleting messages posted in private chats and channels.
Task 4
You need to ensure that the Approvals app is pinned to the top of the app bar of the Teams client for all members of the Retail team. The solution must NOT affect other users.
Task 8
You need to prevent guest users from calling your company's Teams users.