Or the administrator can assign specific custom profiles to a specific user. But the most important administrator capability is in limiting users with mandatory profiles. Mandatory profiles are profiles the user is assigned by the administrator which the user cannot alter. The three types of profiles are local, roaming, and mandatory. By default, profiles are local unless specified otherwise.
Local profiles store the settings a user makes on the local computer.
If the user moves to another machine, the profile does not follow and a new one must be created. A third identical user name would have 001 appended to it, and so on. A roaming profile is one that is kept on some server, allowing access to the profile from any workstation in the domain. Whenever that user logs on, NT will read the profile from the server instead of the local default directories. The profile file name is still Ntuser.dat.