When you run the
setup /forestprep command, you may receive the following error message:
A problem has been encountered while loading setup components. Canceling setup.
The Exchange Server Setup Progress.log file may contain entries that are similar to the following entries:
[date,time] Setup.exe: ***ERRORLOG EVENT*** : LoadSetupObjectGuid(), QI
IID_IDispatch failure: exsetdata.dll
[date,time] Setup.exe: ***ERRORLOG EVENT*** : LoadComponent(),
LoadSetupObjectName failure: exsetdata.dll
[date,time] Setup.exe: ***ERRORLOG EVENT*** : LoadComponent failed in
ISetupManager::LoadComponentsFromDBObject(): exsetdata.dll
[date,time] Setup.exe: IsRunningUnattended
[date,time] Setup.exe: UnloadSuiteComponents()