Lync 2013 Deployment - External Connection Error's

Hey Experts,

We are currently upgrading our MS Lync 2010 environment to MS Lync 2013 and are having some challenges with it.

The setup is:
AD Domain: domain.local
Web/Email: domain.net

Old 2010 Server (com01.domain.local) - Server 2008R2

CA Server (dc01.domain.local) - Server 2008R2

New 2013 Front End Pool (lync01.domain.local) - Server 2012R2
New 2013 Edge Server (lync02.domain.local) - Server 2012R2

Internal Certs set (lync01.domain.local / lync02.domain.local)
External UCC SSL Cert (access.domain.net, av.domain.net, webconf.domain.net)

DNS/CNAME/SRV Records Applied / All Correct Ports Open - everything is talking to everything (tested extensively).

So everything works but when I run the MS Connectivity Tester on port 5061 I get this error on the Front End Pool Server:

"The certificate received from the remote server does not contain the expected name. It is therefore not possible to determine whether we are connecting to the correct server. The server name we were expecting is lync02.domain.local. The SSL connection request has failed. The attached data contains the server certificate."

I don't get the same error when running it on Port 443?

It seems like the Front End Pool doesn't recognize the Edge Server or the CNAME/Alias from access.domain.net to lync02.domain.local - these are all set and working?

Any help would be great, thank you! Alex.