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Lync client prompting for credentials to connect to certificate service

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Hello,

 

I have successfully deployed a Lync 2010 topology and can sign in successfully via the client, but after a few seconds I am prompted with a popup:

 

Credentials are required

Type your user name and password to connect to the certificate service.

 

Obviously I have tried entering my domain credentials in several different formats. If I cancel the prompt 5 times, it goes away and doesn't prompt me again until I exit and reopen Lync. I've turned on tracing and event log events but neither are showing anything obvious.

 

I am thinking it may be Kerberos related, maybe not all of the SPNs are registered?

Anyone have any ideas?

 

Thanks.


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