welcome to the Polycom Community.
As already explained as a reply to your private message please ensure you always check the FAQ's to ensure a question is not already answered.
The community's Skype for Business FAQ contains this post here:
Jan 26, 2016 Question:Can I make Video Calls between a VVX phone and a Client on a Lync Server / Skype for Business server ?
Resolution: Please check => here <= for details on Video Calls
The above leads to here:
At present no available camera supports Video Calls on Skype for Business using compatible VVX phones.
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