Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
I did this on Windows 10 with my Microsoft Office personal subscription, which just went up 30% in price while crippling me with its copilot rubbish.
Download the ISO for Microsoft Office 2019 if nothing since then is that important to you. This is a link, but I used an ISO I saved years ago, so can't guarantee it.
Uninstall Office 365 using Control Panel >> Programs and Features
Double click on the img file and install it.
When it asks for a serial number, click Back, and you should be asked to register with your Microsoft Account.
Enter you account details, and you have a registered Office without copilot.
Easy as can be. That tells me two things. They HAVE to make it available. They DON'T WANT it to be available.
(There is a sign that says beware of the leopard on the door.)
Disgusted. When I find a 1TB cloud that works with all my devices, I am gone from Office and MS. Or they can make a 1TB cloud without office for $5 per month.