The Information Protection team is constantly making improvements to mail flow encryption to protect your incoming and outgoing emails. With new security vulnerabilities constantly being uncovered, and communication privacy being in the spotlight now more than ever, we seek to upgrade our service to only use the most secure Transport Layer Security (TLS)-based encryption available.
With today’s update, Outlook now uses Active Directory Authentication Library (ADAL)-based authentication for Exchange Online mailboxes in Office 365, replacing the previously used basic authentication method. This new authentication method enables IT administrators to configure new access scenarios for sign in to Office 365 and to better control and manage Outlook on mobile devices in their organization.
We are pleased to announce that Exchange Online Advanced Threat Protection (ATP) is now available to purchase through our direct channel, the Microsoft Online Subscription Program (MOSP). Starting June 1, 2015 you will be able to order ATP through MOSP. You can also purchase ATP through Volume Licensing and Cloud Solution Partners starting August 1, 2015.