Run the Get-IRMConfiguration command to view your Exchange Online configuration for the protection service.
From the output, locate the AzureRMSLicensingEnabled value:
If AzureRMSLicensingEnabled is set to True, Exchange Online is already enabled for the Azure Rights Management service.
If AzureRMSLicensingEnabled is set False, run the follow command to enable Exchange Online for the Azure Rights Management service: Set-IRMConfiguration -AzureRMSLicensingEnabled $true
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