Retention policy for Teams chat not working

Hello Afsar_Shariff,

You need to verify two key factors before concluding why deletion isn’t happening:

1. Conflicting Retention Policies
   Check if the user is subject to any other retention policy that conflicts with the one you shared. If another policy is configured to retain content for a longer duration, that policy will take precedence, and deletion will not occur.
2. Litigation or eDiscovery Hold
   Confirm whether the user’s mailbox or content is under a litigation hold or eDiscovery hold. If either is active, items cannot be deleted until the hold is removed.

Example:
If your policy is set to delete items after 30 days, but another retention policy retains them for 90 days, the 90-day policy will apply, and deletion will be skipped.

Refer to: https://learn.microsoft.com/en-us/purview/retention-policies-teams#how-retention-works-with-microsoft-teams 

https://learn.microsoft.com/en-us/purview/retention?tabs=table-overriden#the-principles-of-retention-or-what-takes-precedence 

https://learn.microsoft.com/en-us/microsoftteams/retention-policies#how-teams-retention-policies-support-retain-and-delete-actions 

Hope this helps!

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