How to activate Azure Rights Management from the Office 365 admin center
Use these instructions if you have access to the Azure Rights Management service from the Office 365 admin center and you are a global administrator.
To activate the Azure Rights Management service, you must have either an Azure Information Protection Premium plan or an Office 365 plan that includes Rights Management. For example, your organization has a plan for Office 365 E3 or Office 365 E5.
If you have questions about the subscription requirements, or you need help activating the service, contact Microsoft Support or use your standard support channels.
When you have confirmed that your organization has a plan that includes Azure Rights Management, go to the Rights Management page in the Office 365 admin center.
If you are prompted to sign in, use an account that is a global administrator for Office 365.
For admin center help, see About the Office 365 admin center.
If you prefer to navigate to the rights management page from the admin center: Settings > Services & add-ins > Microsoft Azure Information Protection > Manage Microsoft Azure Information Protection settings
On the rights management page, click activate.
When you see the message Do you want to activate Rights Management?, click activate.
You should now see Rights management is activated and the option to deactivate.
Resume reading Activating Azure Rights Management.