EV and OWA 2013, Content Was Blocked because not signed by valid cert
I've deployed the EV Outlook Mail App to my user, however if I try to retrieve an archived mail using the EV App I get
App Error. Something went wrong and we couldn't start this app. Please try again later or contact your system administrator.
Then I get
This app may not load properly, but you can still try to start it.
And eventually I get.
Content was blocked because it was not signed by a valid security certificate.
As far as I'm concerned we have the correct security certificate on the server. But it appears that the server alias name I have, doesn't tie in with the wildcard certificate that we have internally for our domain.
How do I change the server name that EV uses when a user tries to connect to the Exchange 2013web app from his client desktop?