This security update resolves vulnerabilities in Skype for Business and Microsoft Lync Server. The most severe of these vulnerabilities could allow elevation of privilege if a user clicks a specially crafted URL. An attacker would have to convince users to click a link in an instant messenger or email message that directs them to an affected website by way of a specially crafted URL. To learn more about the vulnerability, see Microsoft Security Bulletin MS15-104.
How to get and install the update
Microsoft Download CenterYou can get the stand-alone update package through the Microsoft Download Center.
Install and removal information
How to install and remove this security updateTo install or remove this security update, see article 3061064.
Note We don't recommend that you remove any security update.