PKlapwijk
It´s a little tricky. First activate through outlook. Then it will work with all app
Try https://docs.microsoft.com/en-us/azure/information-protection/faqs-rms
Look at the section How do I configure a Mac computer to protect and track documents?
You will see:
Open Outlook and create a profile by using your Office 365 work or school account. Then, create a new message and do the following to configure Office so that it can protect documents and emails by using the Azure Rights Management service:
In the new message, on the Options tab, click Permissions, and then click Verify Credentials.
When prompted, specify your Office 365 work or school account details again, and select Sign in.
This downloads the Azure Rights Management templates and Verify Credentials is now replaced with options that include No Restrictions, Do Not Forward, and any Azure Rights Management templates that are published for your tenant. You can now cancel this new message.