Is there a way to set up a send connector in Office 365 that relays undeliverable incoming mail to another server?
Basically, I'm setting up a hybrid deployment of Office 365 - some of the emails are defined in Office 365, but SOME users are still using the legacy POP3 email provided by the web hosting provider.
The MX records are pointing at Office 365, so I need to set up Office 365 to relay mail destined for domain which is not locally deliverable to the web hosting provider's SMTP server.
In Exchange 2010/2013 I would do this by setting up an additional Send Connector, and defining the Accepted Domain to be an "Internal relay domain" instead of an "Authoritative Domain". (see here: http://technet.microsoft.com/en-us/library/bb676395(v=exchg.141).aspx
Can you do the same thing in Office 365 somehow?