Empty contact groups disappear in Instant Messenger
If you create a new contact group in Instant Messenger but do not assign any contacts to the group, then logout and log back in, the contact group no longer appears in the contact list.
Workaround: Add a contact to the contact group before logging out of Instant Messenger.
Privacy profile not enforced on contacts when added to a group.
In a deployment with a pool of servers, if you move a contact from one contact group to another, the privacy profile for that group does not take effect on the recently moved contact.
Workaround: Sign off and back in to Instant Messenger after making changes.
If you import a contact list that contains entries from multiple domains, only those entries in your domain are imported.