Outlook always gets an error with the certificate and reactivates "connect to exchange over http"

Hi,

we have an Small Business Server 2011. A few days ago all Outlook-Clients started to give the error, that the certificate is not corresponding to the domain it connects to. We only work local so i deactivated the check at the tab "connection" of the mailaccount at the option "connect to Exchange over http". Then outlooks works normal.
But after restarting the computer this option is checked again...
From where do outlook get this information and how can i change it ?
Or what is the Problem of the certificate? Nothing were changed nor was there a certificate that was at its enddate. It is a selfmade cert out of the server.
We use Outlook 2007.

Thanks for your ideas  !
loosainAsked:
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Simon Butler (Sembee)Connect With a Mentor ConsultantCommented:
The setting is being repopulated by Autodiscover. The only way to stop it from being populated is to disable Outlook Anywhere in Exchange.

HOWEVER, that isn't really a fix. You are looking at the symptoms rather than the cause. When the clients connect you should check if they are connecting via HTTP or TCP. Hold down CTRL with Outlook running and right click on the Outlook icon in the system tray. Choose Connection Status. It will show how it is connected.

Simon.
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MetaltreeConnect With a Mentor Commented:
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loosainAuthor Commented:
Thanks for your ideas. But the problem was un upgrade of the antivirus. However it blocked something between the Exchange-services. I don´t know what exactly went wrong, but after uninstalling the antivirus and restarting the server everything was fine again (even with the connection over http).
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