WebStore, Moving your items to a different ArcGIS Online account
Steps to move your ArcGIS Online items from one account to another
With the implementation of University wide single sign on for ESRI ArcGIS Online you may find the need to move your items from one account to another.
In fact we encourage everyone to use the Enterprise single sign on and to move away from the ArcGIS invitation only accounts.
If you had an ESRI ArcGIS Online account in the University Organization you will find then none of your items appear in your new Enterprise account enabled with single sign on.
This link provides detailed steps for moving your items from your old ESRI ArcGIS Online account to your new Enterprise account.