Lync 2010 iPad client issue

I've been playing with the iPad Lync client on my lab but haven't been successful establishing a connection. I followed this article:Deploying the Lync 2010 Mobility Service : Jeff Schertz's Blog but am still getting a certificate errors.
Anyone has it working?
Anyone has it working?
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Check this out: http://images.apple.com/iphone/business/docs/iPhone_Digital_Certificates.pdf
Should be the same for the Ipad.