Without saying anything, Microsoft changed where Microsoft 365 stores Teams compliance records in user and group mailboxes. The logic behind the change is impeccable even if it will cause PowerShell scripts to break. In addition, any ISV claiming to backup Teams by copying compliance records has some work to do.
In addition to mailbox permissions, Exchange Online supports folder-level delegated permissions. Users can create folder delegations through Outlook desktop. Like mailbox permissions, it’s a good idea for tenants to check folder-level delegations to ensure that people don’t keep permissions for longer than they should. We explain how to create a PowerShell script to generate such a report.