September 8, 2015 Security Updates for the Skype for Business and Lync

Server-side:
https://technet.microsoft.com/library/security/ms15-104 - Important

Vulnerabilities in Skype for Business Server and Lync Server Could Allow Elevation of Privilege (3089952)

Client-side:
https://technet.microsoft.com/library/security/ms15-097 - Critical
Vulnerabilities in Microsoft Graphics Component Could Allow Remote Code Execution (3089656)