As we start deploying more of the Essentials stack, the log files move a bit. In the past I would ask for the sbssetup.log file if any migration or install issues cropped up. Now with Essentials I’ll be asking for a different log file.
In particular I’ll be asking for a log file called ConfigSvc.log and it will be located in a hidden folder C:\ProgramData\Microsoft\Windows Server\Logs\
If you have any errors during the install it will be logged in ConfigErrors.log