Month: February 2017

Exchange Error: 550 5.1.1 RESOLVER.ADR.ExRecipNotFound

Sometimes you have a reason to restore a mailbox from back-up, because it was deleted by mistake or a former employee is hired again. But after restoring the mailbox, several (internal) users are not able to send email to the restored mailbox and receive an error message like: Delivery has failed to these recipients or …


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