You need global admin credentials for Sharepoint to perform the migration. As the global admin user, make sure to log in to the Sharepoint admin console and assign yourself as the owner of the root site.
Set up Sharepoint as source system
- Provide a unique name for the job.
- Select Sharepoint Online.
- Follow the on-screen instructions to connect Sharepoint Online:
- Log in to Sharepoint using your global admin credentials.
- Authorize Box Shuttle to access your data.