Can you merge 2 apple ID's
What if you had a previous email address but cant sign on because you no longer are with that company for your internet provider
Question marked as
You can't merge Apple IDs.
You need your Apple ID password to sign in. Not being able to use the ID email address as an email address to send emails shouldn't prevent you from signing into your Apple ID. See if you can change the email address that is your Apple ID. Note the restrictions in the article.
Apple ID Name Change.
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.