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Alin Pastrama

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I am running Kerio Connect 7.4.3 on an OSX 10.8 server. I import my users from a Microsoft Active Directory. The Kerio+AD setup has been in place for about a year now and has been running smoothly. During the past week I started having the following issue:

AD users fail to login to Kerio, both from their clients and from the web interface. Their AD credentials work on all other systems that we use. The two solutions to this that I have found to work are:

1. Remove the user from Kerio, then re-add it.
2. Reset the user's AD password.

Sometimes a combination of the two is necessary until the user is able to login to Kerio again.

Is this a known/common issue?

Note: This might not have anything to do with AD, as I do not have any local users to compare. However, I expect that such an issue would be well known and addressed by now if it were related strictly to Kerio, hence I suspect the AD integration.

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AFAIK there is no known issue.

Check all patches/updates on AD server and Mac OS X Server installed in last one or two weeks.

To see more about issue, you should enable modules "User Authentication" and "Directory Service Lookup" in debug log.

Alin Pastrama

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No updates have been installed on the Kerio server or the AD domain controller recently. I may have found the cause of the problem, though.

My AD domain is AD.COMPANY.COM.
My Kerberos realm is COMPANY.COM.

These have been configured accordingly in Kerio. However, it seems that the Kerberos realm at some point changed to AD.COMPANY.COM. I cannot find anything in the logs that would point to when, or why this change took place.

Now I have changed the settings back to what they should be. Let's see if the login issue still occurs, or if the Kerberos realm changes name again.

[Updated on: Fri, 23 November 2012 21:16]

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