I am developing an an add-in for Outlook with the Office.js API and I am wondering if it is possible to use it from the MessageComposeCommandSurface on Office Online from a mobile device with Android or iOS?
According to https://learn.microsoft.com/en-us/office/dev/add-ins/concepts/requirements-for-running-office-add-ins It should be possible to run add-ins on the Outlook Web App on iOS devices unless i am misinterpretating it.
I know it is possible to make support the MobileMessageReadCommandSurface in the native apps, but our add-in wants to manipulate a message being composed.
Currently, we do not support compose add-ins on mobile platforms, whether in the native app or the browser. We track feature requests via UserVoice, and there's currently a feature request for this feature. Please use this link and upvote the feature request. Feature requests on UserVoice are considered when we go through our planning process.