I am migrating a company from Exchange 2007 to 2010 server. After I installed Exchange 2010 the users started getting certificate errors on the Exchange 2007 server when using OWA. When you goto the url for webmail this is what occurs. the logon page appears. I type in the logon credentials and i get the following error.... ERROR CODE: 500 INTERNAL SERVER ERROR. THE CERTIFICATE IS REVOKED. (-2146885616). Has anyone seens this?

Have you done any changes at all regarding certificates? Does the url for webmail stil point to the Exchange 2007 server?Martin Sundstrm | Microsoft Certified Trainer | MCITP: Enterprise Messaging Administrator 2007/2010 | http://msundis.wordpress.com

And the certificate haven't been revoked from the provider? It's not expired? Intermediate certificate is OK and installed?Jonas Andersson MCTS: Microsoft Exchange Server 2007/2010 | MCITP: EMA 2007/2010 | MCSE/MCSA Blog: http://www.testlabs.se/blog

We have not made any changes reguarding the certificate. The url still points to the Exchange 2007 Server. We hav requested the new cert for the 2K10 server and have installed it on the Exchange 2K10 server but that is it.

The cert has not been revoked and it is not expired for another 60 days. Yes the intermediate cert is installed and ok.

What’s the ISA version? Does the issue happen when attempting to access OWA on the CAS server directly? Resources: FW_H_ServCertVerif Clients receive a "500 Server" error message if a Web server requires a Certificate Revocation List in ISA Server 2004James Luo TechNet Subscriber Support (http://technet.microsoft.com/en-us/subscriptions/ms788697.aspx) If you have any feedback on our support, please contact tngfb@microsoft.com

No it does not. It works just fine. It also is random when it occurs from the outside. It is not all the time.Preston Thornhill pthornhill@fusionstorm.com

Quote: “No it does not” So, the issue only occurs when the users access their OWA via ISA, right? If so, please use the “ISA” forum to check the log files on the ISA server, see if there’s any error traces for the causeJames Luo TechNet Subscriber Support (http://technet.microsoft.com/en-us/subscriptions/ms788697.aspx) If you have any feedback on our support, please contact tngfb@microsoft.com