Re: Better expect some invoices then
And no doubt the clients will be seeking damages for lost work.
Normally I'd say you're flat out of luck if you read the license agreement, but given that MS is relentlessly* trying to ram it down people's throat there may be a case for unauthorised access (Computer Misuse Act). I wish you luck with that one, though, you're probably better off documenting the whole process and publishing it so MS will pay you to shut up and not undo their marketing as it's cheaper for them.
(*) IMHO in an attempt to get an annual subscription income instead of the one-off shots they've been bleeding out of the population for years which are far less controllable as a revenue stream. Honestly, this whole forcing people seriously smacks of desperation so I'd really like to know what's going on at Redmond. Something has changed.