I've created a DEM personalisation for the Zoom VDI client (optimized Zoom client to run inside Horizon)
It basically stores it's information in the %appdata%\ZoomVDI folder. However, it also saves a folder with emojis inside that folder. Size it not that big (about 9MB), but it contains over 2.500 files which does has a performance impact when (un)zipping the profile archive so I excluded that folder and it's related json files. The emojis folder gets recreated automatically in the background when starting the Zoom client.
It also contains the registry run key for Zoom to allow it to start automatically with Windows. Of course, you'll have to set "processing at logon/logoff for this to work" instead of using directFlex.