how to force (enable) window decorations on application

I recently needed to join a "Zoom" meeting from my Debian workstation on which I use Fluxbox for my window manager. The Zoom application starts in the upper left corner of my display with no titlebar or window decorations, so I cannot move it or otherwise manipulate it as I would with other windows. (I can perform some actions by right-clicking on Zoom in the toolbar, but options there are limited). The Zoom application doesn't provide any inline help nor did it come with a readme or man page, at least that I have been able to find. Is there a way to instruct Fluxbox to force window decorations on this window, either before or after starting the tool?