As an aside, even if all else fails and I need to factory reset my devices - I'm not sure if that's straight forward if you can't log in to the currently enroll

As an aside, even if all else fails and I need to factory reset my devices - I'm not sure if that's straight forward if you can't log in to the currently enrolled Apple ID... > If asked, enter your Apple ID. https://support.apple.com/en-gb/102506 https://support.apple.com/en-gb/102506