Sametime Public group breaks if members do not exist in the names.nsf
Members of Sametime public groups do not display or appear listed when doing a
right click -> Show Group Contents from the Sametime contact list if any member of
the list does not have a person record in the LDAP Domino directory.
No Sametime users will be present in the public group.
A member of the Sametime public group does not exist in the names.nsf
ST Community server 220.127.116.11 configured for Domino LDAP server.
Diagnosing the problem
Check that all of the member names in the affected Sametime public group reside in the names.nsf (have a person record in the LDAP Domino the Sametime server is configured to use).
Resolving the problem
Work around is to remove the person from the Sametime public group then stop and start the Sametime Community server.
Changing the default access on the primary names.nsf from "No Access" to "Reader" resolves the problem too.