The Office 365 account that you use to perform a OneDrive for Business migration must have one of the following Office 365 roles assigned to it:
- Global Administrator (preferred)
- SharePoint Administrator
- App-based Authentications for SharePoint and OneDrive
Follow the steps in the Assign admin roles in Office 365 for business article from Microsoft to verify or assign a Global Administrator or SharePoint Administrator role to the account that you plan to use for the migration.
Read the About Office 365 admin roles article from Microsoft to learn more about the administrator roles available in Office 365.