readCSPAccounts.py script fails:
Unable to prepare the import data because of error: The appropriate service plan can not be found.
More specific error could be found in the
DEBUG aps_endpoint: Unable to use the service plan '1234' because it contains a resource rate of a resource which is not an Office 365 resource.
Checking the mentioned Service Plan it appears it exactly contains a Resource Rate based on non-Office 365 Resource - for instance, pure Billing Resource, which is not created on the Operations side.
Set the following settings on the Billing side for the Resource Rate in question:
Show in Store No Show in CP No
and repeat the data collection procedure. Then switch the settings back.
Documentation improvement request #APSA-19539: "[Documentation] Office 365: readCSPAccounts.py script does not support non-Office 365 Resources in Billing" has been created to reflect it in the Provider's Guide.