Symptoms
Sales Order for Office 365 subscription and corresponding task in OA fails:
"message": "Value cannot be null.\r\nParameter name: upn"
sitelog
error:
DEBUG aps_endpoint: Company Administrator members loaded: 0
ERROR aps_endpoint: Error occured during customer creation.
System.ArgumentNullException: Value cannot be null.
Parameter name: upn
Cause
Customer uses "Use existing Microsoft account"
option, but there are no active users with "Global Administrator"
role in the Microsoft Portal.
Resolution
Please create a Global Administrator
user (admin@.onmicrosoft.com) in the Microsoft Portal and re-submit Order for provisioning.