Lync clients on a Windows Phone 7 device (and possibly other devices) are not able to sign in to Lync Server due to a missing root certificate chain for Baltimore root certificates. Check out this article for the step-by-step solution.
Authors : Moustafa Noureddine, Microsoft Senior Program Manager Lead | Mark Barringer, Microsoft Service Engineer
Published : June 28, 2013
Product version : Lync Online, Windows Phone 7
Lync Mobile clients are unable to sign in to Lync Online, because...(read more)![]()
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