Installing the Adobe Connect Add-in
Presenters and hosts must install the Adobe Connect add‑in the first time they attempt to upload content or share a screen. The add‑in is a special version of Flash Player with additional features for hosts and presenters. The add‑in provides support for uploading PPTX files to the server and sharing screens during a meeting. You can install the latest add-in (and other updates) from the Downloads and Updates page.
Note: Installing the add-in is not necessary to upload files of all the supported types, except PPTX files. Former can be uploaded from the browser too.