Are you saying that you don't see the Communications tab in ADUC on the AD server, or either server, or that you are looking for the raw attributes in ADSIedit and are not seeing them in your forest? Assuming it's the first scenario, you'll need to install the OCS Administration Tools on any any server where you plan to manage AD user accounts (like your domain controller).
If you are running R2, here's where you can find the Admin Tools: http://blogs.pointbridge.com/Blogs/schertz_jeff/Pages/Post.aspx?_ID=54
For the original release you can run the tools directly from the install media at \setup\i386\setup\admintools.msi
Jeff Schertz, PointBridge | MVP | MCITP: Enterprise Messaging | MCTS: OCS