This has just popped up for one of my users. Nowhere in AD can I find the duplicate. But when an outside user sends mail to one of my users they get the error: "A configuration error in the recipient's e-mail system prevented delivery of this message. Two recipients are configured with the same e-mail address. contact your administrator." I've never seen that before and I didn't think it was possible in AD to have two objects with the same e-mail address. Anyone have any clues?
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To show how to create a transport rule in Exchange 2013. We show this process by using the Exchange Admin Center.
Log into Exchange Admin Center.: First we need to log into the Exchange Admin Center.
Navigate to the Mail Flow >> Rules tab.: To cr…