Hi -- I am having issues logging in to Lync.

I recently installed OS X Yosemite 10.10.1 and installed Lync for Mac 14.0.10 (141024) and I have not been able to log in to Lync. When I try to sign in, I get the error message "Sign in to Microsoft Lync failed because the service is not available or you may not be connected to the internet." I get this error message even though I am logged in to my company's network/internet.

Is anyone else having this problem and is there a solution?

Thanks!