You can change the global administrator account of an app that you have created.
From the navigation pane, go to Protect > Applications > Office 365.
The Office 365 apps page appears.
Click the OneDrive for Business app for which you want to change the global administrator account.
The app page appears.
In the OneDrive connection settings section, complete the following steps:
The Add Global Administrator dialog box appears.
Enter the new global administrator account email address and password.