Assume that you view a screen sharing from a third-party remote desktop protocol (RDP) implementation (for example, Cisco, Acanovmr, or Pexip) in Microsoft Skype for Business 2015 (Lync 2013), and the sharer's resolution is lower than yours. Then, you try to zoom into the content to make it fill the whole stage. In this situation, a crash occurs in your side unexpectedly.
To fix this issue, install the February 7, 2017, update (KB3161988) for Skype for Business.
Note Lync 2013 was upgraded to Skype for Business in April 2015.