[pndy]

I wonder if the other device present on the account could be causing this - the one that isn't compatible with this Advanced Data Protection. Or as in comments in this 3 months old thread, it could be caused by some maintenance issue.

[pgm8705]

I only have two Apple devices, my iPhone 14 Pro and my M1 Macbook Pro, both in front of me when this happened. You can't enable this feature if you have a non-compatible device tied to your account.

Yes, I was informed by Apple Support that this was a maintenance issue. That doesn't satisfy me. The entire premise of Advanced Data Protection hinges on the promise that it only your devices can access your data. If this setting can be disabled remotely (be it malicious or not), that is obviously concerning.