A footnote:
We had the opposite problem in WinXP. By default the Home Directory in user manager is map rooted and we needed to revert to the NT mapping. i.e.

Home dir is N: = \\Server\Users\Group\UserID
Share is \\Server\Users (mapped to N
so Home directory is N:\Group\UserID

On WinXP this became:
Home dir same
Share is same
but Home directory is now N:\

There is a registry entry (also in Win2K) of ConnectHomeDirToRoot which the following sets back to the NT style.

code:
 	
WriteValue("HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System","ConnectHomeDirToRoot","1",REG_DWORD)

This was necessary as we use %HomeDrive%%HomePath% which the WinXP system breaks.