Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
For anyone still coming here for a solution after doing a google search....ignore all of the other suggestions. It's probably AI responding in the thread.
ANYWAY, I finally found a little way to at least hide the stupid copilot button in Office apps. Annoyed I didn't figure it out sooner. Sure, it's probably running in the background but if you disable the other suggested items in privacy...it might disable it enough.
Whether on Windows or Mac, bring up the Customise Ribbon interface and simply remove "Assistance" from the Home drop-down. It will be below Add-ins, most likely, assuming you don't have anything else on the ribbon to the right of it. Select Assistance, click the << Remove button, click OK.