I previously had my Apple ID set up with the email address
email@example.com, and I enabled iCloud and Find my iPad on my iPad with this Apple ID. Then, at some point later, I changed the email address on my Apple ID to
firstname.lastname@example.org -- it's the same Apple ID account, I just changed the email address on it. Now I'd like to disable iCloud and Find my iPad on my iPad, but it won't let me.
In particular, Settings >> iCloud on my iPad still lists the old email address
email@example.com. When I try to sign out of iCloud or disable Find my iPad on my iPad, my iPad prompts me for the password corresponding to
firstname.lastname@example.org. However, no Apple ID for
email@example.com currently exists, and my iPad won't accept my password. It's prompting me for the password for an email address that no longer exists.
My current hypothesis is that the iPad got confused when I changed the email address on my Apple ID, and never updated the email address it has associated with iCloud on the iPad.
How do I fix this?
(Even more confusingly, I can log into the
firstname.lastname@example.org iCloud account via a browser and see my iPad listed under Settings >> My Devices and listed under Find iPhone via the web iCloud interface for
email@example.com. I went to Find my iPhone via the iCloud web interface and removed my iPad from Find iPhone on there, but back on my iPad, iCloud and Find my iPad show up as enabled on my iPad's Settings app.)