Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
I've also been searching for a way to disable this loathsome, intrusive and unwanted junk from my office apps.
For anyone on a Family plan there is a workaround: it turns out that Microsoft only inflicts CoPilot on the primary account holder, not other family members. So in my case the workaround was to create a new Microsoft account, invite the new account into the family, and switch to that one as my primary for using Office apps. Hey presto - no more hideous CoPilot icons intruding in Word and Powerpoint docs.
I dare say Microsoft will cotton on to this and simply raise the price of the Family plan yet again and force-activate their unwanted spyware on all accounts, but at least it buys some time to look for alternatives.
This whole experience is a stark reminder of what happens when we, as users, allow ourselves to become dependent on an unregulated monopoly. Windows is easy to ditch as Mac and (for many) Linux offer perfectly good alternatives, but Office is harder to get rid off completely if you need to share docs with others as the best alternative, LibreOffice, is still not 100% compatible with complex formatting (and I'm sure MS will do all they can to keep it that way). Right now they seem like the most viable way forwards, though, so I'm off to donate...