Get Information Barrier User Detail

 Get-ExoInformationBarrierRelationship -RecipientId1 "user1@xyz.com" -RecipientId2 "user2@xyz.com"

Get Teams policy User List

 Get-CsOnlineUser -Filter "TeamsMeetingPolicy -eq 'RestrictedAnonymousAccess'"

Audit Teams chat

Auditing Private Chats in Teams - Microsoft Community

 Microsoft Teams > Find Chat Conversations Between Users

7/9/2021 · Applies to the Security and Compliance Center using eDiscovery to find conversations in Microsoft Teams

Teams Online Status / Presence issue

 https://learn.microsoft.com/en-us/outlook/troubleshoot/user-interface/presence-icons-do-not-show-in-outlook