Kristof Kowalski » OCS http://www.kowalski.ms Thu, 31 Mar 2011 12:08:21 +0000 en hourly 1 http://wordpress.org/?v=3.3 Cannot sign in because your computer clock is not set correctly or your account is invalid. (Error code: 0-1-492) http://www.kowalski.ms/2010/04/26/cannot-sign-in-because-your-computer-clock-is-not-set-correctly-or-your-account-is-invalid-error-code-0-1-492/ http://www.kowalski.ms/2010/04/26/cannot-sign-in-because-your-computer-clock-is-not-set-correctly-or-your-account-is-invalid-error-code-0-1-492/#comments Mon, 26 Apr 2010 14:30:35 +0000 Kristof http://www.kowalski.ms/?p=196 Back again after bit of a long hiatus. We’re in the midst of finally upgrading our LCS 2005 SP1 infrastructure to Office Communications Server 2007 R2. Yeppp… tell me about it. All good things come to those who wait right?

Anyway, in my test lab I’ve been getting the following error when access Communicator Web Access (CWA) from a remote machine;

Cannot sign in because your computer clock is not set correctly or your account is invalid. (Error code: 0-1-492)

Now Microsoft has a KB article about this error;

http://support.microsoft.com/kb/968978

.. but from what I notice a lot people out there don’t know how to apply Service Principal Names (SPNs) correctly. So to resolve this issue, add a Kerberos SPN to the CWAService account that matches the CWA Web site alias, such as https://im.contoso.com.

To perform the task you must have membership in Domain Admins, Enterprise Admins, or you must have been delegated the appropriate authority;

setspn -A HOST/im.contoso.com CONTOSO\CWAService

Enjoy.

Kristof Kowalski

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