I am in the process of migrating to exchange 2013 from 2010. All roles are installed on each server. The exchange 2013 is setup as the CAS server for connections, as I have made the required changes in dns to point to it. The one issue I have come across is that OWA is not working properly, when a users mailbox is on the exchange 2010 server. He can login to OWA, but the page is all garbled. It shows all the folder names with missing icons besides them all along the left side of the screen. It works fine when the users mailbox is on the exchange 2013 server. One thing I did notice is that the url is showing ashttps://owa.accellos.com, so if I append owa at the end of the url and refresh, it works. Why is it not doing that automatically?
Thanks
Carlos