Microsoft (Exchange Online_Plan 2) – Additional Plan
Exchange Online Plan 2
Email, calendar and contacts accessible from PC, phone or Web. Email, calendar and contacts experience which also includes advanced archiving, compliance and integrated voicemail capabilities. 50GB mail box + unlimited archiving

Microsoft (Azure Active Directory Rights Management) – Additional Plan
Azure Active Directory Rights Management
Azure Active Directory Rights Management enables a User to create and consume protected content. User has the ability to assign rights restrictions to email or documents (in Exchange and SharePoint Online for V1) and send it to anyone. Anyone has the ability to receive, view and reply to restricted content from another User. Admin has the ability to assign licenses, configure templates and mange encryption keys