What cmdlet is used to activate OME for a tenant?

The cmdlet that is used to activate Azure Information Protection (AIP) and rights management services, including Office Message Encryption (OME), is indeed the Set-IRMConfiguration cmdlet. By using this cmdlet, administrators can configure and activate email encryption capabilities within a tenant, which is essential for ensuring secure communication through encrypted messages.

Set-IRMConfiguration allows you to set parameters such as the rights management service (RMS) URL and enables the services necessary for OME, thus making it the appropriate choice for activating OME. This cmdlet is key for managing the information protection settings that dictate how information is encrypted and shared in the organization.

On the other hand, cmdlets like Enable-OME and Activate-OME do not exist in the context of PowerShell commands for managing Azure Information Protection, and Start-IRMConfiguration is not the correct command for this purpose. It is important to understand the correct usage and the specific functionalities of cmdlets within the PowerShell framework when applying rights management and encryption solutions.