Step-1 Go to Admin Console and you will be redirected to the browser where you have to login using the source/destination admin email id.
Step-2 After successful login, select the Security option.

Step-3 Navigate to Advance Settings option and click on it.

Step-4 Here, click on Manage API Client Access to go to the API settings.

Step-5 Under the Client Name field, enter the Client ID as stated below and under One or More API Scopes, add the scoped as comma separated provided by the Software.
Client ID – 115619257296967527373
Scopes -
Finally, click on Authorize button

Step-6 Once the scopes are added, they will be listed as under:

For OneDrive user account backup, you need to create new service accounts with the Admin Privileges, and then assign SharePoint Site Account Connection Admin Privileges to it.
Create New Service Account with Admin Privileges
Step-1 First of all, login to the O365 Management Panel by an account with the Admin Privileges and then Click on Sign-in button. on the left pane

Step-2 Then click Users & Select “Add a User”

Step-3 In details page, enter all details for new service account and then click Next.

Step-4 In Settings Page, choose Yes for assigning Admin Permissions and from drop-down menu, choose Global Admin. Additionally, the users can even add an alternate mail address & location and the select Next.

Step-5 In send results in mail page, click on Create Button. The service account information can’t be sent to Admin. Now, to activate the account, log in to Office 365 Management Panel via a new Service Account and update its password.
Step-1 First of all, login to O365 Management Panel with Service Account Credentials
Step-2 Then Go to Admin Center & Select Sharepoint

Step-3 Then, Click on User Profiles

Step-4 Then Click on Manage User Profiles.

Step-5 Within Find Profiles field Type the Name of Account & click on Find

Step-6 Now Click on User Account Name & Select on Manage Site Collection Owners

Step-7 Now Site Collection Owner Window is displayed, within site collection Administrator field, add Service Account with Administrative Privilege using the check user or directory list icon.

After adding the Administrator of the site collection, next steps is to add users into Site Collection Administrator that you may want to access data (onedrive data) and download the data from from Onedrive.

Enter The Username & Click on “Check User” icon

Step-8 Or Using, Directory Icon to Select Account from Directory

Step-9 Finally, Search within the Directory & Click on OK

Note- You need to repeat the steps below for every user, or to access every users. To Gain access to an Employee’s or any users account One drive Account
Step-1 Now go to App Launcher > Admin Link

Step-2 From left-hand-panel, choose Users > Active Users

Step-3 Check the box next to user’s name whose OneDrive account you are trying to access, then click OneDrive Settings

Step-4 Under Access section, click on Access files

Step-5 After just a few seconds, you will be presented with a direct link to employee’s OneDrive account. Enjoy!

For Admin account migration with all users and accounts, login using Dropbox business account.