I changed my Apple ID a few months ago – and I think I updated it everywhere I need to. Everything seems to be fine (on iPhone, ipad and MacBook Pro) except when I use Apple TV it keeps showing my old Apple ID and I need to delete it and enter the new ID and password every time I want to watch something. Can anyone help?
Apple ID – How to Fix Apple TV Showing Old Email After Changing Apple ID
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Best Answer
Probably the easiest thing to do is to just reset your Apple TV back to its factory settings.
You don't specify the exact model, so below are instructions for multiple models of Apple TV.
Apple TV 4 and Apple TV 4K
Apple TV models up to Apple TV 3