There seems to be a Lync 2013 client problem with CU1. At least with the German x32 version of it. Powerpoint upload doesn’t work as expected since the installation of CU1. See the following screenshot: ppterror Everytime someone uploads a PowerPoint Presentation into a conference the presenter get the view above. Unusable for presentations. I’ve narrowed the problem down to the client CU1. If I deinstall the CU1 components, PowerPoint presentations work quite well. If I reinstall CU1 it starts to look like above. If I use the Lync 2010 client I also don’t have any problems. I’m using the German version of Lync 2013 client (15.0.4454.1506) MSO (15.0.4454.1504) 32-Bit on a 64-Bit Windows 8.

Edit: Lync 2013 CU2 did solve the problem.