We are running into a strange problem with the Lync 2013 Web App Plug-in all of a sudden prompting our users for credentials via UAC when the plug-in installs. We were told that the plug-in is a per-user installation and does not require admin rights to install as long as we add *.lync.com to our trusted sites list and provide UDP/TCP firewall domain access for the plug-in executable (lwaplugin.exe).
As seen in the attached screen shots we are seeing a strange UAC prompt during the MSI plug-in install which the user initiates after downloading the MSI from Lync meeting web page (infra.lync.com) the first time they go to join a meeting. We see this issue for both the 32-bit and 64-bit Lync Web App Plug-in MSI installation packages.What is really strange is the "D:\Users\rtbldlab\AppData\Local\..." program name which seems to indicate a problem with the MSA package...
32-bit Installer...
64-bit Installer...
It should also be noted that we are using a tool similar to AppLocker for application whitelisting and have whitelisted the (4) Lync Web App executables (LWAPlugin.exe, LWAVersionPlugin.exe, AppSharingHookController.exe and AppSharingHookController64.exe).
Any assistance or guidance would be greatly appreciated!!
Regards,
JJ