With Server for PCNFS you can obtain UNIX-style user identifiers (UIDs) and group identifiers (GIDs) that can be used to connect to UNIX resources.
When you send a user name and password to Server for PCNFS, it compares them with its password file. If the user name and password match one in the file, Server for PCNFS returns the corresponding UID and GID, which are used to connect to the remote NFS server system.