daknetworks.com

As title says, blank page after login to the EAC. Or the OUTLOOK clients can't connect. Or the IPHONE clients can't connect. Or the Exchange Management Shell Fails to connect.

Looking in the WINDOWS-LOGS > SYSTEM, I see, "An error occurred while using SSL configuration for endpoint 0.0.0.0:444."

This happens because EXCHANGE screwed up its binding to the SSL CERTIFICATE.

First, make sure you know what SSL CERTIFICATE the EXCHANGE should be using. You can see a list of SSL CERTIFICATES in IIS:

• -open IIS MANAGER.
• -click SERVER CERTIFICATES.

You want to make sure that it is issued by a TRUSTED SOURCE (like GoDaddy, GlobalSign, Comodo, Symantec). Also, make sure that all the appropriate alternative names are in the certificate (like autodiscover., computer-name., www., mail., webmail., null)

Once you know what certificate that you want to use.

• -open IIS MANAGER.
• -browse to the "Exchange Back End" website.
• -click Bindings (on the right-hand side).
• -mark the "https" binding (normally on port 444) and click Edit...
• -change to the correct certificate.
• -click OK > CLOSE.
• -click server name (on the left-hand side).
• -restart IIS.

That should do it. Sometimes the binding to the SSL CERTIFICATE gets screwed up. There are other threads out there talking about "netsh http show sslcert" and to "netsh http add sslcert ipport" but this doesn't change it to the correct SSL CERT. Changing it to another SSL CERT is simply guessing which is an overall bad idea. We need to understand the problem.