O365 tenant provisioning fails with the error:
APS Application Error: 500 Internal Server Error [ApplicationUnknownError] Provisioning: resource 5c8e9f57-4d2c-47d3-a0b4-0c60cd9dacc8 of type 'tenants' (http://www.parallels.com/Office365/Tenant/1.1) for APS application 'Microsoft Office 365-6.2.1-14': Unable to find parent for addon d32c1ae8-e9ad-40f0-810c-becc79d1ff93.
The subscription has an addon purchased, but the offer it is based on is not among the addon's parents.
Configure the addon parent offers per the official MS offer matrix.
This should be done at TOP > Services > Applications > Office365 > Instances > Your Instance > Addon types