Earlier quoted context omitted.
AI can't, as I understand it, have copyright over anything they do. Nor can it be an entity to sign anything. I assume the "not-copyrightable" issue, doesn't in anyway interfere with the rights trying to be protected by the CLA, but IANAL .. I assume they've explicitly told it not to sign things (perhaps, because they don't want a sniff of their bot agreeing to things on behalf of MSFT).
Are LLM contributions effectively under public domain?
I can't remember the specific case now, but it has been ruled in the past, that you need human-novelty, and there was a case recently that confirmed this that involved LLMs.