I could use some help here. I know it should be obvious but somehow I'm not seeing it. Here's the situation:
- Exchange 2010 organisation managing authoritatively the SMTP domain domain1.com - mailboxes with SMTP addresses of email@example.com are bulk added to that organisation. The addresses exist externally. - domain2 is NOT listed as Remote or Accepted domain, nor is it added explicitly to the address space of any Send connector - I would like Exchange to deliver mail sent to firstname.lastname@example.org externally instead of putting it into the newly created mailboxes for a period of time, then revert to normal behaviour
Is it even possible without deleting those SMTP addresses and re-adding them afterwards?
Many thanks in advance, your help is appreciated, as always.
That's not possible with the default behaviour of Exchange. The server will try to deliver the messages locally first, then send an NDR or deliver them external depening on the type of accepted domain.
I think you should remove the addresses temporarely, or modify them with _temp in the address or something like that and add the domain as an accepted domain of type internal relay.