Does anyone know how to configure the maximum number of contacts allowed for Communicator 2007 via a registry key? I know there is a GPO for this, but can't find how to do it manually for non-domain machines.

This could help you ! http://blog.insideocs.com/2008/12/01/managing-the-size-of-ocs-2007-contact-lists/ Anil

Thanks, but I dont see how that lets me edit it through the registry. Or will the server settings override that anyway?

Hi RJ022, Per your description, the issue seems related with OC, please post the issue below forum: http://social.technet.microsoft.com/Forums/en-us/category/ocs You will get more help from there. And Anil gave some good information which contains how to set the registry value to change the limitation on the client end. Please read it and follow the DOC, you will achieve your target. Regards! Gavin TechNet Subscriber Support in forum If you have any feedback on our support, please contact tngfb@microsoft.com Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

OK, I still dont see in that article from Anil what registry key i need to set exactly to get the desired results without a GPO. I will post in the other forum.