Just tried latest GroupWise 14.2.2 Windows Client unattended setup and seems to me dotnetfx45_full_x86_x64.exe parameters is wrongly set in install.ini.
is: /q:a /c:"install /l <log>"
should be: /q /log <log> /norestart
At least in original way our setup get stuck in end of .NET Framework 4.5 setup and log wasn't set into correct place.
Well, "/norestart" I'd add just in case.