Hi Guys,
Recently our ISA 2006 on W2k3 server died and needed to be rebuilt for use for our Websites, including OWA. We decided to upgrade both the server and the ISA software so now we have a new W2k8 Standard server with TMG 2010 Standard installed.
The previous config was exported and imported to the new server for TMG. We updated the rules and checked the Listener settings and everything looks ok.
When we navigate to the OWA page form our client machine, we can get to the login page but after logging in we get an error page with the following message "Error Code: 500 Internal Server Error. The signature of the certificate cannot be verified.
(-2146869244)"
I can verify that the correct certificate has been imported to the Listener and we are using Basic Authentication with HTML Form Authentication. I have installed the certificate in both the Personal and Trusted Root Certification Authorities stores and
verified that there are no errors on the certificate.
We have other websites being successfully published. When we test the rule for publishing OWA, there are always red crosses (see attachment).
Exchange 2007, TMG 2010 both on Win2k8 machines.
Any ideas will be greatly appreciated
Regards,