Due to an infrastructure change I needed to move my exchange 2013 (Version 15.0-build 847.32) on Server 2012 to another Windows Server R2 with exchange 2013 (Version 15.0-build 847.32). Both servers are virtualized with Hyper-V and all updates applied. They are currently running in a coexistence mode and working fine. How I did the switch over by taking the IP from the old sever and added it to the new server. the old server is offline. In the virtual directories I matched the Internal and External URLs.
When I brought up webmail I did get a logon box. However, after I logged on I get a auth page that can't be found. What step did I miss in transferring over to the new email server in a coexistence environment?