Monday, February 09, 2009

OCS 2007 R2 Deployment, Part 4

We have already prepared Active directory, Installed OCS 2007 R2, and configured the server and certificate.
In order to have internal IM and LiveMeeting capabilities, we only need to do a few more things.
  • Create required DNS entries
  • Enable users for OCS 2007 R2
  • Deploy Communicator Clients
  • Enable Audio/Video on clients with new hardware


So, first off.. If you are only doing internal OCS, you only need to be concerned with your internal LAN DNS.

Communicator looks for several DNS entries. If you turn on event logging in the client, you learn it looks (in this order - replace domain.com with your internal FQDN)

  • SRV record for SIP

  • sipinternal.domain.com

  • sip.domain.com

  • sipexternal.domain.com

I created sip.domain.com as a CNAME to my OCS 2007 R2 server:



Enabling your users is very simple from ADUC once the OCS administrative tools are installed. Since OCS 2007 R2 is 64 bit only, I have yet to find the 32 bit admin tools. (If you find this, please link me and I will update this post!)

Right click the user in ADUC and choose Enable user for OCS


Choose the server or pool, the SIP naming convention (I recommend using email address), then next and finish.

Deploying the Communicator 2007 R2 client (OC 2007 R2, but I find that naming to close to not be confusing) can be done in MANY ways. It is supplied as an MSI, so you can:

  • Put the MSI on a file share and email users the instructions
  • Deploy via GPO
  • Logon Scripts
  • Deploy using SMS/SCCM/SCE

Once deployed, for domain machines with Communicator installed, it is as simple as launching in order to get the IM and presence functionality. Beyond this, there is audio/video which requires PC's with webcams and headsets with microphones. If this is not pre-existing, I typically budget 80-120$ per node for the addition of hardware as needed.

After installing our webcams and microphones, internally we were able to do VOIP and Video calls immediately after deploying the client.

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