If you are using NIS, you can specify in the /etc/nsswitch.conf file to search the NIS project maps for projects:
project: nis files
The NIS maps, either project.byname or project.bynumber, have the same form as the /etc/project file:
projname:projid:comment:user-list:group-list:attributes
For more information, see Chapter 5, About the Network Information Service, in Working With Oracle Solaris 11.2 Directory and Naming Services: DNS and NIS .