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The expiry is set to 45 days of inactivity.
- A notice will be issued out at 30 days, 15 days, and 1 day before the Team is deletedexpires.
The following user actions will lead to automatic renewal of groups
- SharePoint – View, Edit, Download, Move, Share, Upload Files
- Teams – Any comment in the teams channel
After a Team expires, there is a 30 day grace period to recover the chat history and related files. 30 days later the files and history is deleted permanently and unrecoverable.