GoDaddy certificates functions Perfectly with Lync 2010.
You have to Buy a UCC certificate from Godaddy in order to achieve this.
Will Take up a Scenario,
You have configured 3 Public IPs to your Lync EDGE Server.
203.111.222.179 - sip.abc.com
203.111.222.180 - webconf.abc.com
203.111.222.181- av.abc.com
Your Reverse proxy Details are :meet.abc.com, dialin.abc.com, webexternal.abc.com
Now We are going to request a Single Godaddy UCC Certificate which should be as below.
SN : sip.abc.com
SAN : sip.abc.com, webcon.abc.com, meet.abc.com, dialin.abc.com, webexternal.abc.com