We are migrating from an Exchange 2007 environment to Exchange 2013 and have a huge problem. Once a user's mailbox is moved over to the 2013 server they can no longer reach their mailbox. OWA works fine, its just Outlook.
I can manually create a profile for the user and it validates the servername and user but the mailbox won't open.
The message the user sees is something like Outlook is unable to open your default folders.
There is just a single Exchange 2013 server with all the roles installed on that machine. All the Autostart Exchange services are running. The RPC over HTTP Proxy service was not installed by the Exchange installation but I have since installed that feature.
Thanks for your help.