A change made to an Office 365 retention policy for Teams personal chats in the KPMG tenant removed data for 145,000 users. That’s unfortunate, and it underlines the need for admins to understand how retention policies work. Maybe the people involve did and it was a simple slip that could happen to anyone, but perhaps it will cause tenant admins to reflect on how they make changes to organization configurations.
https://office365itpros.com/2020/08/26/teams-retention-error-removes-data/
