Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
I tried that and id didn't make any difference for me ...
If you start the services.msc applet using Run As admin you can change the start type from automat, or Manual, to Disabled. That won't restart at all.
I also tried stopping the "Microsoft Office Click to Run" service. That didn't help either.
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I too noticed a difference, for the worse, in how things run/not. Previously I noted that unplugging my network connection would allow me to use it. No more. Nothing I do will allow me to use it without signing in.
This sucks.