This policy setting prioritizes the use of Windows Background Interface Transfer Service (BITS) by the Office client when downloading Office updates from the Office Content Delivery Network (CDN).
If enabled, BITS will be used on devices that are downloading Office updates directly from the Office CDN and throttle values used by BITS will be honored. The device will not leverage BITS if updates are obtained from a local UNC share.
If disable or not configured, BITS will not be prioritized and http will be the primary transport for downloading updates.
Important: This policy setting only applies to Office 365 clients that are installed by using Click-to-Run, including Office 365 ProPlus, Office 365 Business, Visio Pro for Office 365 and Project Pro for Office 365. It doesn't apply to Office products that use Windows Installer (MSI)