Exchange Server 2013: Internal Certificate Issue

Dear All,

I have MS Exchange 2013 with domain name: Exchange.local (fqdn: ex001.exchange.local).

I had created the accepted domain for xyz.com. I bought the Wildcard Certificate for *xyz.com. I had issued the certificate to my MS Exchange server.

External/Internet users: they can setting up and connected with MS Outlook

but I had problem with internal. when I setup account to MS Outlook. it failed and cannot connected to MS Exchange server because invalid ex001.exchange.local.

Do you have best solution and commend on this issue for internal users?

BR,

KH

Khemarin333@hotmail.com