I’m pleased to announce the IT Pro and Developer Preview of Office 2016 for the Windows desktop. We’ve been in private preview with Office 2016 for several months. Now we’re ready to expand the program to our commercial Office 365 customers, an important milestone that gives IT pros and developers an opportunity to start testing the upcoming release. To be clear, this early build doesn’t yet contain all the features we’re planning to ship in the final product. However, through the course of the preview, customers should expect to see new features delivered through monthly updates.

We’ll share more on the end-user enhancements planned for this release at a later date, but here’s a brief summary of some of the valuable updates for IT pros and developers.

Data Loss Protection (DLP)—Over the last few years we’ve added DLP to Exchange, Outlook, OneDrive for Business and SharePoint. Now we’re bringing these same classification and policy features to Word, Excel and PowerPoint. With these new capabilities, IT admins can centrally create, manage and enforce polices for content authoring and document sharing—and end users will see policy tips or sharing restrictions when the apps detect a potential policy violation.

Outlook—We’re delivering a number of significant technical improvements to Outlook.

  • MAPI-HTTP protocol. We’ve replaced the RPC-based sync with a new Internet-friendly MAPI-HTTP protocol that supports Exchange/Outlook connectivity.
  • Foreground network calls. We’ve eliminated the use of foreground network calls to ensure that Outlook stays responsive on unreliable networks.
  • Multi-factor authentication. With this release of the Outlook client, we’ll support multi-factor authentication through integration with the Active Directory Authentication Library (ADAL).
  • Email delivery performance. We’ve reduced the amount of time it takes to download messages, display the message list, and show new email after resuming from hibernation.
  • Lean storage footprint. We’ve added settings that allow users to better manage storage by only retaining 1, 3, 7, 14 or 30 days of mail on the device.
  • Search. We’ve improved the reliability, performance, and usability of Outlook search, and integrated the FAST-based search engine in Exchange.


Click-to-Run deployment—For customers on our Office 365 subscription service, the 2016 release includes new deployment features that IT pros have been asking for:

  • Better network traffic management. We’re introducing a new Background Intelligence Transfer Service (BITS) to help prevent congestion on the network. BITS throttles back the use of bandwidth when other critical network traffic is present.
  • Enhanced distribution management. We’re improving our integration with System Center Configuration Manager (SCCM) to allow IT admins to efficiently download and distribute monthly Office updates using the native SCCM features.
  • Flexible update management. We’ve created a way for admins to manage the pace at which they receive feature updates and bug fixes while continuing to receive regular security updates.
  • Simplified activation management. We’re adding a feature in the Office 365 Admin Portal to allow admins to manage device activations across users.


Macros and Add-ins—We’re not making any changes to Macros or Add-ins in this release. It’s rare that “no changes” is a something we’d want to highlight, but we think it’s worth celebrating the consistency in the programming model across releases. We understand how important this is and we’re committed to a high level of compatibility as we continue to innovate. (See dev.office.com for more on how we’re innovating in Office extensibility.)

Accessibility—We’ve improved keyboard accessibility for high-value Excel features like PivotTables and Slicers, addressed a number of readability issues in Outlook, and introduced a dark theme for users with visual impairments.

Information Rights Management (IRM)—We’ve extended IRM protection to Visio files, enabling both online and offline protection of Visio diagrams.

These are just some of the new capabilities IT pros and developers will experience in the Preview. We’re excited about this milestone in our development process and are looking forward to hearing your feedback. For more details on the Office 2016 Preview program and instructions on how to download the applications, please visit the Office 2016 Preview program on the Microsoft Connect site. We’ll continue to update the product with new features as they become available and will periodically highlight significant announcements here along the way.

—Kirk Koenigsbauer
Source: Announcing the Office 2016 IT Pro and Developer Preview - Office Blogs