You can use either UNIX-style password and group files or Network Information Service (NIS) servers to create maps for UNIX-style ...

You can use either UNIX-style password and group files or Network Information Service (NIS) servers to create maps for UNIX-style users and groups.   If you are using NIS servers, skip this section.   If you are not using NIS servers, you must copy password and group files to this computer, and then configure User Name Mapping to use them.  You use the UNIX User Source property page to configure this. To access the property page, do the following:    1.  Open the Microsoft Services for Network File System console.   2.  In the console tree, right-click User Name Mapping, and then click Properties.   3.  In the User Name Mapping Properties dialog box, click the UNIX User Source tab.