Enable SaaS API Data Loss Prevention for Microsoft 365 Tenants
You can enable SaaS API Data Loss prevention for authorized tenants that use the following Microsoft 365 applications:
- Sharepoint Online
- OneDrive
- Outlook (For outgoing mail only. For incoming mail you can enable Cloud Access Security Broker Protection; see Enable Cloud Access Security Broker Protection for Microsoft 365 Tenants.)
Note: You cannot add an application to an existing tenant. If you have an existing Microsoft 365 tenant that uses one or two of these applications and you wish to add another application to that tenant, you must first revoke authorization for the existing tenant, then create a new tenant using all the desired applications.