Reorganizing Active Directory Groups

We have been using Openfire with Active Directory for a couple of years now and have been very happy with it. We have created Groups in Active Directory to organize the contact list.

The question I have is we just went through a major reorganization and I need to reorganize the contact list as well. I have created all the new groups in Active Directory, but have yet to make any Openfire changes. What kind of impact should I expect when I go in to the Groups tab and switch on the Contact List Sharing for the new groups and turn off for the old? What would be the best approach to this since we are a 24/7 business?

Thanks

the impact would be that the new groups will become available and the old will go away on the next launch of the client application by the users.