http://blogs.technet.com/chlacy/archive/2007/12/04/partition-address-book-by-organizational-unit.aspxI happen to run across this rather unknown setting the other day while working with a customer and thought it was interesting. I'm not sure why anyone would use it, but thought I'd share the information because I'm sure someone out there has a need toen-USCommunityServer 2.1 SP1 (Build: 61025.2)http://blogs.technet.com/chlacy/archive/2007/12/04/partition-address-book-by-organizational-unit.aspx#2607726Tue, 04 Dec 2007 18:31:14 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:2607726Philip Flint<p>Hi</p> <p>Very useful - just so you know, the reason you would want to do this is in a hosted situation (where you dont want one organisation to see another organisations addresses). Typically, this may be an educational authority hosting for several schools on one set of servers not wanting pupils in one school to be able to search for pupils in another school ... especially if they are using IM to organise fights and things !</p>http://blogs.technet.com/chlacy/archive/2007/12/04/partition-address-book-by-organizational-unit.aspx#3023536Sun, 30 Mar 2008 06:07:48 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:3023536Ben<p>More simple way is to use ABSConfig from the OCS Reskit :)</p>http://blogs.technet.com/chlacy/archive/2007/12/04/partition-address-book-by-organizational-unit.aspx#3152569Thu, 13 Nov 2008 21:19:18 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:3152569xxbenxx<p>I used the absconfig from the OCS resource kit but users can still seach all OCS enabled users when using Menu &gt; Tools &gt; Add Contact from the Communicator client. Even when the address book is partitioned by OU. Any way to limit Add Contact to OU also??</p>