Exchange 2013 EAC / ECP Blank Screen

When trying to log in into the new Exchange 2013 EAC / ECP you encounter a plain blank screen and get no options at all. The URLs you may see this error on are below.You must attach to these addresses on the CAS server so you need the CAS role installed.

Ive seen this with two seperate issues, one is SSL cert related and one is corruption. If it is SSL related you will see this error in event viewer.

To resolve this drop to command line and enter the following.

netsh http show sslcert

This will show all certs, make a note of the certs HASH and the APPID.

Delete the erroring cert with this command.

netsh http delete sslcert ipport=0.0.0.0:444

Now we assign the cert with the hash and the appid you noted.

netsh http add sslcert ipport=0.0.0.0:444 certhash=123123123123123 appid="{123123123123-1231231235}"

Restart the server and you will now see the ECP

In my situation it was because one of the virtual directories in IIS have become corrupt, we need to recreate them, to do so run the following commands.

To remove and recreate the ecp (Default Web Site)

Remove -OwaVirtualDirectory -Identity Servername\ecp (Default Web Site)

new-OwaVirtualDirectory -InternalUrl https://ServerFQDN/ecp -WebSiteName Default Web Site

To remove and recreate the OWA (Default Web Site)

Remove -OwaVirtualDirectory -Identity Servername\owa (Default Web Site)

new-OwaVirtualDirectory -InternalUrl https://ServerFQDN/owa -WebSiteName Default Web Site

This resolved my Exchange 2013 OWA and ECP blank screen issue