The role assigned to application isn't supported in this scenario
After an upgrade, the following error is encountered when running the Azure backsync:
Processing data from remove server outlook.office365.com failed with the following error message: [AuthZRequestId=<ID>][FailureCategory=AuthZ-CmdletAccessDeniedException] The role assigned to application <App ID> isn't supported in this scenario.
Missing permissions on the backsync Azure Application.
Option 1: Restore missing permissions on the Sync Service backsync Azure Application.
Option 2: Delete the Azure backsync Mappings, Workflow, and Connections from the Sync Service, and delete the Azure Application in Azure. Afterwards, recreate the backsync using the Sync Service Console to reconfigure default backsync configurations and permissions.