Plug-in isn’t detected after installation If you still can’t install the plug-in, review this list of issues and errors. If that succeeds, consider clearing your browser cache to remove obsolete credentials that might be interfering with sign-in. Open an InPrivate browsing session in Internet Explorer and try joining the meeting again. Go to Control Panel > Programs and features and, if required, uninstall existing versions of the plug in. Make sure your computer operating system and web browser are on the list of supported platforms. If you’re having trouble with plug-in, try these suggestions first:
The Lync Web App plug-in is required for audio, video, and screen sharing during a Lync Meeting.
