...
The AccountName and SkuProductNumber can be obtained by an Azure AD administrator for the business, they will need to have the Microsoft Graph PowerShell SDK installed:
Via Powershell run the command: Connect-Graph -scopes Organization.read.all
Then run the command Get-MgSubcribedSku, the output of this command will provide you with the AccountName and the SkuPartNumber’s to choose from.
Once complete click 'Save'
...