Upon installation, Server for NIS extends the schema, adding classes, objects, and related attributes required to provide UNIX attributes for users, groups, and computers. In addition, the extensions allow a variety of Network Information Service (NIS) maps to be stored in Active Directory and also allow Active Directory to act as the NIS master server for NIS domains. The extension of the schema and addition of classes to Active Directory is an irreversible process, and these schema extensions and resulting classes cannot be deleted.
Upon installation, Server for NIS creates an NIS domain with the same name as the Active Directory domain. Administrators can add users, groups, or computers to this domain. Moreover, administrators can migrate UNIX NIS domain data to Server for NIS and designate the Server for NIS computer as the master NIS server for the migrated domain.
If you uninstall Server for NIS while it is running in a master mode, you must ensure that some other server takes over the responsibilities of the master server. If you uninstall Server for NIS in a master mode, and there are other Windows 2000–based subordinate (slave) NIS servers in the domains supported by the master server, you must promote one of the Windows 2000–based subordinate NIS servers to be the new master server. Server for NIS cannot be a subordinate server to a master NIS server running on UNIX.
If you uninstall Server for NIS running as a subordinate server, the domain controller on which it was running will continue to receive NIS map updates through Active Directory Synchronization.