Is it possible to install a private add-on (that isn't published in the GSuite Marketplace) in my organization's Gmail?
If so, how can I do that?
I went through all the settings under Apps Settings of the Google Admin console, but I couldn't find how to do it. I couldn't find any documentation either.
Best Answer
According to https://developers.google.com/gmail/add-ons/how-tos/publish to allow other users on your domain to install your add-on you should give them the deployment ID.
The instructions for installing unplublished add-ons are published on https://developers.google.com/gmail/add-ons/how-tos/install-unpublished