The key information rights management (IRM) features within Windows Azure AD Rights Management that are available in Microsoft Office 365 Enterprise E3 and Microsoft Office 365 ProPlus include:
Office IRM Integration. Rights Management enables Microsoft Office Professional Plus 2013 and Microsoft Office 2010 users to protect content using predefined IRM policies provided by the service within a company. Office applications that include these capabilities are Word®, Excel®,PowerPoint®, Outlook®, and InfoPath®
Exchange Online IRM Integration. Rights Management enables Exchange Online users to IRM-protect
email messages in Outlook Web Access and access IRM-protected messages through Exchange Active
Sync for devices that have implemented IRM support including Windows Phone®
SharePoint Online IRM Integration. Rights Management enables administrators of SharePoint Online
to create IRM-protected document libraries. Therefore, when a user checks out a document from the
IRM-protected document library, IRM is applied to the document and the user has the rights to it as
specified in the document library IRM settings