iCloud Authentication Problem
I recently changed the password on my AppleID. When I did so, I logged out all my other Apple devices (6 of them). When I logged back into my devices, none of them were able to authenticate with certain iCloud services (iCloud Keychain, Advanced Data Protection, etc).
The loop proceeds as follows:
System Settings gives a notification that I need to update my AppleID settings. As you can see, I am logged into my AppleID, so we can accept that I know the correct password for the account, and that is not the problem.
Clicking "Continue" brings up the following prompt:
I enter the password, which leads to the next prompt:
Fair enough and pretty self explanatory. The example photo is from my primary laptop, and the same prompt comes up on all my devices. The prompt appears slightly different on iOS devices, but is fundamentally the same.
I enter the device passcode and the following message appears:
Clicking continue takes us back to the first image in an endless loop. Clicking cancel has exactly the same perceived effect.
Now, if I go to the iCloud panel:
And I attempt to turn on "Passwords and Keychain" I get the following:
I toggle the slider, which prompts:
Pressing "Continue" brings up:
If I am on an iOS device, the prompts look slightly different, but are functionally the same.
I enter the password, which causes the device to pause for a log time while it tries to communicate with the server. Then this window pops up:
Clicking "Continue" or "Cancel" takes us back here, ad nauseam (with the slider in the OFF position):
The same loop happens when trying to turn on Advanced Data Protection.
Lastly, I can't get Access iCloud Data on the Web to turn on, either, so there's no way of managing this directly on Apple's servers, either. This appears to be a timeout issue. Attempting to turn this on results in a long delay, then I get this:
I have tried logging out all my devices and logging back in. I have tried a complete wipe and reinstall of my iPhone (all that did was completely delete my keychain on the phone THANKS!). I have tried removing all devices from my Apple account, except my laptop. I have changed the AppleID password three times. Nothing has had any positive effect.
Changing networks has no effect. Taking iPhone off wifi and forcing mobile data does not work, not does the reverse. My network is not firewalled, and I am the admin of my local network. All other services are working flawlessly. I am not on a VPN. My connection to the ISP is not double NATed.
I have exhausted all the available advice on this message board, and Google at large.
Any other thoughts or ideas?
MacBook Pro 16″, macOS 13.4