Certificate Warning in Outlook

We renewed a UCC Certificate on Exchange 2010 with Provider Starfield.

With the new Certificate, on Oulook 2013 clients in the LAN a warning appears, that the Name is not ok. It is possible to continue without problems. Nevertheless, the message comes after each start of Outlook.
We also noticed that the configuration for new Outlook Profiles with recognition of is not running automatic, since the certificate is replaced.

On the dialog, there was a announcement, that after October 2015 only FQN are allowed. So we less alternative names in the certificate.
From outside the LAN everything works fine, for OWA an RCP over HTTPS.

Before we used certificate with:
CN = www.mydomain.com
OU = Domain Control Validated
O = www.mydomain.com 

Actual Certificat we used certificate with:
CN = remote.mydomain.com
OU = Domain Control Validated

Any idea?
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The internal names are not in the certificate usually.
The workaround is to set virtual directories - autodiscover, webservices, and so on to have the external name (the one in the certificate). Make sure DNS resolves internally for these names.
MASEE Solution Guide - Technical Dept HeadCommented:

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Ever since the change you mentioned I had to change the inside URL addresses using exchange powershell. Mail.yourdomain.co.uk is where you stick your outlook anywhere URL  

Set-ClientAccessServer -Identity Server -AutodiscoverServiceInternalUri https://autodiscover.yourdomain/autodiscover/autodiscover.xml

Set-WebServicesVirtualDirectory -Identity "server\EWS (Default Web Site)" -InternalUrl https://mail.yourdomain/ews/exchange.asmx

Set-OABVirtualDirectory -Identity "SERVER\oab (Default Web Site)" -InternalUrl https://mail.yourdomain/oab

Set-UMVirtualDirectory -Identity “server\unifiedmessaging (Default Web Site)” -InternalUrl https://mail.yourdomain.co.uk/unifiedmessaging/service.asmx
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MASEE Solution Guide - Technical Dept HeadCommented:
I explained the same in my article above.
Kudos goes to you MAS, took a while for me to type it out.
perolinAuthor Commented:
Problem partially solved.
Internal DNS Forwardzone was configured with SBS 2010 Installation

know I added  the zone mydomain.com and it works fine, no more warnings after starting outlook.
But to build new outlook profile the autoconfiguration still fails.

Thanks for all the very fast answers.
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