I found the solution in another thread, thanks
>Is it possible to ‘Push’ a roster out based on the memberships of that user? I have LDAP with AD setup in OpenFire and I use Spark as the IM client. Openfire >automatically created all of the groups and memberships, but when I log in as a particular user they get a blank roster and have to manually add everyone. Is >there an easy way to push out a roster?