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Karl Foley's Blog

A personal blog of an IT techie - This is a convenient place for me to jot things down before I forget.

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Communicator 2007 Automatic Sign-in Failure

In my case this was caused by lack of DNS entries.
Just creating a sip CNAME to my OCS 2007 server was enough, but there are others you can create.

I found a tool that helps you troubleshoot DNS issues here.

A\CNAME records:
  sip.domain.com
  sipinternal.domain.com
  sipexternal.domain.com

SRV Records:
  _sipinternaltls._tcp.domain,com
  _sipinternal._tcp.domain.com
  _sip._tls.domain.com

Posted: Saturday, December 13, 2008 10:23 AM by Karl
Filed under: ,

Comments

Karl said:

This started causing certificate errors on the client. I found the best option was to delete sipinternal.domain.com and sip.domain.com and create an SRV record:

Domain: domain.com

Service: _sipinternaltls

Protocol: _tcp

Priority: -

Weight: 100

Port number: 5061

Host: ocs2007server.domain.com

# December 14, 2008 8:21 AM
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