Hello,
I have coexistence scenario with Exchange 2010 and Exchange 2013. All mailboxes are in Exchange 2010 servers and only one test mailbox is in Exchange 2013 server.
When I open Exchange 2013 OWA, I can access only to the Exchange 2013 mailbox. If I login with Exchange 2010 credentials in OWA 2013, I get an error like "X-FEServer: casservername".
In both Exchange 2010 and 2013 CAS, the internal and external URL are the same "https://exchange.mydomain.com/owa
There is no errors registered in Eventviewer.
I need to use Exchange 2013 OWA to access all mailboxes before migrating them to new databases, because we are going to change public A DNS to redirect traffic to new Exchange 2013 OWA.
How can I do?
Thank you
