Jonas Leclercq

Rostunya Omelyan

@organicleopard339276 · Jan 11, 2026 8:46 pm

Full Inbox for Microsoft Team, Unable to Delete

We have a Microsoft Team for a department that has a full inbox. When you delete messages, they reappear within seconds. I contact support and they said there is a retention policy attached to the inbox. They asked me to run these two commands, that fail:
* Set-Mailbox "username" -RemoveDelayHoldApplied
* Set-Mailbox "username" -RemoveDelayReleaseHoldApplied
After relaying that they failed, this was the response:
However, further review confirmed that (the email) is a Microsoft 365 Group (Teams) mailbox, not a standard mailbox type. For Group/Teams mailboxes, delay holds are enforced at the compliance layer and are automatically managed by Microsoft. As a result, these delay holds cannot be manually removed using Exchange PowerShell, and the above commands do not take effect for this mailbox type.
 Although the mailbox has been excluded from the applicable retention policy, Microsoft applies a mandatory **delay hold period (up to approximately 30 days)** after removal or exclusion.
This is ridiculous. Is it true that you have to wait up to 30 days? Is there a better alternative solution here?