To unmark a mailbox that has been marked for removal on the server, you can follow these steps:
- Go to the Exchange Admin Center (EAC).
- Navigate to Protection > Action Center.
- Select the Search icon and enter the SMTP address of the blocked user.
- Click Unblock Account and click Yes to confirm the change.
Please note that these instructions are specific to Microsoft Exchange Server. If you are using a different email server, the steps may vary.
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