In Solaris, users must belong to at least one group, called the primary group for each user.

Because of error or oversight, no groups are available to choose and these users are all assigned the default of Group ID 10. See the following Note, to make other groups available for selection.

Note: Check group files, NIS maps, or LDAP for possible corruption. If you have not already populated appropriate files or maps, see System Administration Guide: Naming and Directory Services (DNS, NIS, and LDAP) on docs.sun.com. For LDAP, see also Solaris Management Console Help->About the Toolbox Editor->"To Manage LDAP."