Can't move or delete emails

If this is happening in Outlook for Windows and started recently for multiple people, use this order:

1. Update Outlook
   Go to File > Office Account > Update Options > Update Now.
2. Restart Windows
   This helps complete any pending Office or Windows updates.
3. Try Outlook on the web
   If moving or deleting works there, the issue is likely in the Outlook client rather than the mailbox.
4. Create a new Outlook profile
   If the problem continues in Outlook for Windows, create a new profile and test again. Keep the current profile so it can be switched back if needed.
5. If the item still cannot be deleted, try Outlook on the web first
   Microsoft recommends closing all clients that access the mailbox, then starting Outlook and retrying. If that fails, try deleting the item in Outlook on the web.
6. If Outlook on the web also cannot delete the item, use Outlook cleanup switches
   Close Outlook, then run:
   • outlook /cleanreminders
   • outlook /cleandmrecords
7. If only one IMAP folder is affected when moving mail
   Try switching to a different folder and back, then retry the move. If needed, close and restart Outlook and try again.
8. If this is a folder move/delete problem in Exchange Server 2016 or 2019 online mode
   The operation can fail when the destination already contains a folder with the same name, including Deleted Items. In that case, install the required Exchange cumulative update:
   • Exchange Server 2019: Cumulative Update 4 or later
   • Exchange Server 2016: Cumulative Update 15 or later
9. If none of the above works
   Open an in-app support ticket from Outlook using Help > Contact Support. In a business environment, the tenant administrator can also open a support ticket from the Microsoft 365 admin portal.

References:

• Outlook error "Cannot move the items" when moving items to other folders | Microsoft Support
• You can't remove a calendar item or an email message in Outlook in Microsoft 365
• You receive an error when moving emails to another IMAP folder | Microsoft Support
• Can't move or delete folder in Outlook online mode if the destination has a folder with the same name in Exchange Server 2019 and 2016 | Microsoft Support