If you have mandatory user profiles, no changes to the Windows NT user profile are saved. Each time the user logs on, the default Windows NT profile overwrites the local Windows NT profile; therefore, the Microsoft Exchange Client profiles created during one Windows NT logon session are not available the next time the user logs on.
Use the profile generator to automatically re-create the user's profile each time the user logs on to the Windows NT domain. The profile generator automatically renames the .prf file, so you use the Windows NT logon script to copy the .prf file.
To set up roving users with mandatory user profiles
Copy \\<ServerName>\<Share>\Default.prf H:\
where H:\ is the user's home directory.