Hello,
On my Exchange 2013, i have a domain (domainA.com). This domain exists in my environment and for many reasons, I will always exist.
The domainA also exists in another mail system.
In the two environments I have user1@domainA.com.
When I send a mail with Outlook/OWA to this user, I don't want the mail go in the Exchange mailbox but in the other mail system's mailbox.
I understand when the user exists in the Exchange, the mail will deliver to the Exchange mailbox, any solution to bypass Exchange ?
I tried :
- delete accepted domain
- create external relay in Outbound Connector
- create MX records in my internal DNS
Many thanks