Environment: Lync Server 2013 – On Premise Outlook 2010 Skype for Business 2015 Client (Lync 2013) Issue: After the installation of of KB3114351 client security update for Microsoft Lync 2013 and Skype for Business. We started receiving the error: “Exchange needs your credentials. Until… Enter Credentials” Looking into the issue a bit further it seemed that Exchange Web […]