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I noticed that OneDrive syncs PDFs first before any Office 365 docs. Anyone know why? Also it appears that MS throttles data transmission to their servers. We are in the initial phase of copying all our files to office 365 so there are a bazillion files. initially OneDrive syncs very quickly but as it transfers more data the transmission rate goes down until it finally stops and waits, and waits . . . &nbsp;I checked our bandwidth and it's still within reasonable limits.
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I noticed that OneDrive syncs PDFs first before any Office 365 docs. Anyone know why? Also it appears that MS throttles data transmission to their servers. We are in the initial phase of copying all our files to office 365 so there are a bazillion files. initially OneDrive syncs very quickly but as it transfers more data the transmission rate goes down until it finally stops and waits, and waits . . .  I checked our bandwidth and it's still within reasonable limits.

Why do PDFs get synced first to Office 365/sharepoint?

Microsoft Sharepoint is a software platform and family of software products used for collaboration and web publishing combined. These capabilities include developing web sites, portals, intranets, content management systems, search engines, wikis, blogs, and other tools for business intelligence and collaboration. SharePoint has a Microsoft Office-like interface, and it is closely integrated with the Office suite.

Microsoft SharePoint

Office 365 is a group of software plus services subscriptions that provides productivity software and related services to its subscribers. Office 365 allows the use of Microsoft Office apps on Windows and OS X, provides storage space on Microsoft's cloud storage service OneDrive, and grants 60 Skype minutes per month. Office 365 includes e-mail and social networking services through hosted versions of Exchange Server, Skype for Business Server, SharePoint and Office Online, integration with Yammer, as well as access to the Office software. All of Office 365's components can be managed and configured through an online portal; users can be added manually, imported from a CSV file, or Office 365 can be set up for single sign-on with a local Active Directory using Active Directory Federation Services.

Microsoft 365

Microsoft OneDrive (formerly SkyDrive) is a file hosting service and synchronization service operated by Microsoft as part of its web version of Office. First launched in August 2007, OneDrive allows users to store files and personal data like Windows settings or BitLocker recovery keys in the cloud, share files, and sync files across Android, Windows Phone, and iOS mobile devices, Windows and macOS computers, and the Xbox 360, Xbox One, and Xbox Series X and S consoles. Users can upload Microsoft Office documents to OneDrive.