Can't automatically sign in to Skype for Business 2016 that has December 6, 2016, update installed Content provided by Microsoft Applies to: Skype for Business 2016 Select Product Version All Products Symptoms When you try to sign in to an instance of Microsoft Skype for Business 2016 that has the December 6, 2016, update applied, you get stuck at the sign-in process. Resolution To fix this issue, install the October 10, 2017, security update for Skype for Business 2016 (KB4011159). Last Updated: 10/10/2017 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.