Microsoft, Outlook, 2007, There is a problem with the proxy server's security certificate.

0
August 17, 2011

We had a power outage at my school last night, and now my Exchange 2007 server is not working properly.  Every time a user attempts to open Outlook 2007, they are presented with a login box asking them to connect to the Exchange server using their AD username and password.  When they type in this information and click on OK, they receive the following message:

There is a problem with the proxy server's security certificate.

The security certificate is not from a trusted certifying authority.

Outlook us unable to connect to the proxy server mail.blahblahblah.org. (Error Code 18).

Also the problem isn't just with Outlook.  If a user attempts to connect to OWA, they receive an error message as well (contained in the picture I have attached to this questions.)

Any help would be appreciated.  Thanks!

I have searched for answers on how to fix this problem, but being new to Windows and Exchange (just converted from Novell and GroupWise) is not helping the situation any!

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0
August 17, 2011

Go here:

http://support.microsoft.c om/kb/3202 02

And do Step 4

0
August 17, 2011

I had seen this before, but wasn't really in a place to attempt it.  We waited for an opportunity, and then we implemented this solution.  It worked perfectly.  Thanks!

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