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Exchange 2007 on SBS 2008 OWA and Outlook anywhere issue : ASA temporary certificate

Hi Experts,

We encounter a certificate error on one SBS 2008 server. It is impossible to connect to OWA from the outside  (cert error and redirected to the "+CSCOE+/wrong_url.html" Wrong URL page) or with Outlook anywhere (proxy server's security problem)  since yesterday evening. We can connect to OWA from the inside, the certificate is alright then with the good subject name (domain.dyndns.biz) and is valid up to 2014.
 I checked the certificate from the outside, it is issued by  "ASA Temporary self Signed Certificate" to himself and is valid to 2023. The error message is about trust of the certificate that have to be installed in the trust root store...

The ASA temp cert seems to be created by the Cisco ASA of the customer, I can't find the way to remove it...

There are some errors in the certmgr.msc snap-in : AIA Location #2 , DeltaCRL Location #2 and CDP Location #2 are "Unable to Download", I don't know if it is linked.
With Android smartphones there is a authentication error but everything is fine with BB phones.

Any idea ?

Thank you in advance for your help !
CiscoSSL / HTTPSExchange

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Thank you for your quick response !
I launched the command and re connected to ADSM with the right port to save the change in the flash.
When I want to create a NAT rule for https on the FTTH interface I still receive an error :
nat (inside,FTTH) static interface service tcp https https
       NAT unable to reserve ports.
I can create a NAT rule for https on the ADSL interface, which is the backup interface, without problem.

Any idea ?
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Thank you for your help.

The problem occured after an update of the firmware on a Cisco Asa 5505...

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

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