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OCS 2007 R2, multiple Domains

Posted on 2009-07-09
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Last Modified: 2013-11-29
I have an OCS 2007 R2 implementation running in testing that we are about to move into production. The issue that I have is we have setup the users to SIP with their email addresses. Those with domaina.com work perfect, but those with domainb.com say server is un-available.

I added the SIP domain to the OCS Manager but still no luck. What do I have to do to get it to work? I am using the internal certificate server from my AD versus a 3rd party cert.

Thank You.
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Question by:amedexitt
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by:adamg12345
ID: 24816438
Are you using automatic configuration for the Clients?

Adam
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by:amedexitt
ID: 24818143
I believe automatic config is setup. I have a slight workaround which is to change their sip login to the domaina with username@domaina.com but its a bit of a pain to do it that way.
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by:adamg12345
ID: 24818262
If you use manual configuration and point the clients direct to the OCS Server, does that work for domainb users?

Adam
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by:amedexitt
ID: 24822927
adamg12345, I think manual will work, but this is about 60 of 350 employees and I'd like to avoid having to do that for them due to the headache of managing that.
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adamg12345 earned 500 total points
ID: 24822987
If it works manually then it is either down to DNS or Certificates.

You need to create the SRV records for both domains, the A records that these points to must be the same domain.

so SRV for Domain A must point to ocs.domaina.com
SRV for Domain B must point to ocs.domainb.com

Then in turn the FQDN of the A record must be in the SAN list of the FrontEnd Cert.

I hope that makes sense.

Adam
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Author Comment

by:amedexitt
ID: 24826091
I decided to standardize and have everyone login with their SAM login acct@domaina.com, because theres 4 or 5 different domains and otherwise will be a mess to setup.
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by:adamg12345
ID: 24826163
Ok, just one thing that is worth noting is that if you are going to Federate, it is often easier to have the SIP Address matche the email address, plus exposing the account name is never ideal.

Adam
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