Are you able to manually map a drive to the other Cisco Unity server (and visa versa)while logged on to the server as the same account that you were logged in with when running the Failover Configuraiton Wizard (FCW)?
If you can, make sure you disconnect any mappings before running the FCW as noted earlier.
Additionally if you could have a look at the Windows Event viewer as well as the Failover Configurtion Wizards diagnostic log. The diagnostic log should be in the \Commserver\Logs directory.
The naming convention of the diagnostic log file is diag_FailoverConfig_YYYYMMDD_HHMMSS.txt.
These are the paths to get to each CCX logs through CLI. They may be helpful if you are having issues accessing RTMT or downloading logs through it.
If you want to download them you have to prefix "file get " and you can add one of the options (re...