iPad
Q: How do I change the Apple ID on the iPad Air 2
How do I change the current Apple ID on my brand new iPad Air 2
iPad Air, iOS 10
Posted on Sep 18, 2016 1:07 AM
by King_Penguin,Apple recommended
iTunes
To log out of the account that is being used for the stores tap on it in Settings > iTunes & App Store and then tap 'sign out' on the popup, you can then log in with a different account. Anything downloaded by the currently logged in account will remain tied to that account.
If you mean change the primary email address on the account log into it on http://appleid.apple.com
After changing it : What to do after you change your Apple ID email address or password - Apple Support (or preferably log out everywhere before changing it and back in afterwards)
Posted on Sep 18, 2016 1:12 AM