Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
It may be "inappropriate", but it is the only alternative as Microsoft has consciously chosen (ie, intentionally removed the updates) to leave everyone with Office 2000 with absolutely no alternative.
I know this is a valid link as I have successfully used it.
In general, I agree that I'd like to get a link from the source, but, in this case, the source would prefer you buy a new program as Office 2000 is "too old".