email apple id
How can I change my user email as I have retired from the company which I had an email with and my current email is be used by my wife a your system won't allow me to use that email? I can no longer use the email tied to my apple ID.
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You will need to get another email account/address to use as your Apple ID email address since your wife is using your email address.
Note the restrictions in the article.
What to do after you change your Apple ID or password - Apple Support I suggest doing this before you change your Apple ID or password.