vsto and office web addin in same ribbon tab

Question

Is it possible to add buttons from two different addins (one office web addin, and the other VSTO addin) in the same custom ribbon tab in office 2016? If yes, how?

Answer 1

I don't think so, but this should be something you can determine by a quick test. Define a tab/button in VSTO and then define an Add-in Command for the web add-in and use the exact the same name for the tab in the manifest of the web add-in. I suspect you'll get a two tabs with the same name.