I logged into this machine under a different account and was able to access
the Preferences menu.
Then I logged back under my regular name and rebuilt the
Entourage database. But it still crashes when I go to Preferences.
If the problem is in your User's folder, first test for corrupt Microsoft
Entourage preferences. Your preferences are located in your User's
Preferences folder. Remove these files and test.
com.microsoft.OfficeNotifications.plist
com.microsoft.DatabaseDaemon.plist
com.microsoft.Entourage.plist
Microsoft/Entourage Preferences
2) Test for other preference conflicts
Go into your home folder and take the ~/Library/Preferences folder, and put
all the files in there into a folder on your desktop called old_prefs. The
Finder will lock up when you move them out the first time. Force quit the
Finder.
Now log out and back in, and you will see your Mac is now back to defaults.
Test Entourage , if it works, you know its one of the preference files.
Start with putting everything back in that starts with "com.apple" and log
out/in.
Slowly, a few preference files at a time, move the old ones back into place,
and log out and back in, then test.
Rinse and repeat until you find the bad preference.