OWA must be installed on the desktop as a first step. This can be done by following the instructions for Installing OWA plugin on a PC or Installing OWA plugin on a Mac
Once this is done, open Outlook on your phone. When you click open an email, you should see a screen similar to the following where you can click the three ellipses in the email (not in the blue header) to see your ZynBit Plugin.
iPhone Android
For iPhone, click the + by the ZynBit plugin to enable it the first time you see it in the plugin list.
The plugin will then function just as it does on the desktop. In each email, click the ZynBit plugin to open the ZynBit screens and work as usual.