Skype for Business 2015 (Lync 2013) crashes when the string for the call duration is generated Content provided by Microsoft Applies to: Skype for Business 2015Microsoft Lync 2013 Select Product Version All Products Symptoms When a call is ended, the chat is supposed to update with a line that states how long the call took. However, when this string is generating, Microsoft Skype for Business 2015 (Lync 2013) crashes. Resolution To fix this issue, install the December 6, 2016, update (KB3127976) for Skype for Business 2015 (Lync 2013).Note Lync 2013 was upgraded to Skype for Business in April 2015. Last Updated: Dec 6, 2016 Did this solve your problem? Yes No Tell us what we can do to improve the article Submit Thanks! Your feedback will help us improve the support experience.