Hi all,
having the following issue that started today,everything been working fine until now.
When Office 365 users send e-mail to some on premise users they get the following error in Return.
Remote
Server returned '550 5.1.1 RESOLVER.ADR.ExRecipNotFound; not found'
On premis users (Exchange 2013) can send to the same contact just fine.So for 365 users that failed we have tested the following:
Using OWA,says recepient cannot be found.
All 365 users fails to same recepients,for now a dosen People.
Address that fail,mailboxes are spread accross different databases.
Cannot see any error in event Viewer related to this.
Any tips?
thanks!
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