Wildcard Certifikate - Edge server/External web

In our company we have deployed Lync 2013 CU4 with topology,
Edge server - One for all roles a/v
Front End - Standard with all roles
All certs are form our internal CA, and it works for my domain users. But for all external users or skype we need external cert. We have one wildcard cert for our domain.
So question is can we user wildcard cert for our Edge server, and exteranal serwis of front end.
Front end i think can use that is on tech net: http://technet.microsoft.com/en-us/library/gg398094.aspx

Good morning,
Using a wildcard certificate on Lync Edge server is not supported, and indeed will cause you problems.
It also sounds like you are passing your Lync web services directly to your front end server. This is not recommended, and you should use a reverse proxy for this purpose. You would then place an external (public) certificate on that reverse proxy. So there's
no need for a public cert on the front end in this scenario.
You may consolidate the certificate requirements for reverse proxy and Edge onto a single multi-san certificate, and use that same certificate on both servers.
If you use two separate certificates then it is supported to use a wildcard public certificate on the reverse proxy (web services), but your Edge certificate must be a separate multi-san certificate.
Kind regards
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