How to identify which email id associated with their app store?

1. Start IPad.
2. Hit app store icon from dashboard.

How-to-identify-which-email-id-associated-with-their-app-store-1
3. Click on account icon display on top right corner.

How-to-identify-which-email-id-associated-with-their-app-store-2
4. Account detail for app store mail id would display.

How-to-identify-which-email-id-associated-with-their-app-store-3