Find OneDrive in your Applications folder. Right-click OneDrive and select Show Package Contents. Browse to the Contents Resources folder. Double-click ResetOneDriveApp.command (or ResetOneDriveAppStandalone.command if you're using the standalone app). Start OneDrive and finish the setup process. Instructor If you're using Windows 8.1 or lateryou already have the OneDrive desktop appinstalled on your computer, and I'll talk abouthow to set that up in the next movie.But if you're using a Mac and you want to accessOneDrive outside of using your web browser,or if you're using an older version of Windowsyou'll need to manually download and install the app. Feb 14, 2017 When I setup the.

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This article gives you an overview of how sync works in Microsoft OneDrive. It helps you understand the logic behind how information flows between applications, how the technologies work together, and how data is secured.

How information flows

The OneDrive sync app uses Windows Push Notification Services (WNS) to sync files in real time. WNS informs the sync app whenever a change actually happens, eliminating redundant polling and saving on unnecessary computing power.

Here's how it works:

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• A change occurs in Microsoft 365.

• WNS alerts the sync app of the change.

• OneDrive adds it to the Internal Server Changes Queue.

  • Any metadata changes happen immediately, like renaming or deleting files.
  • Downloading content also starts a specific session with the client.

• Microsoft 365 has metadata pointers directing it through Microsoft Azure.

• The changes are processed in the order they are received.

The previous OneDrive for Business sync app (Groove.exe) used a polling service to check for changes on a predetermined schedule. Polling can lead to system lag and slowness because it requires a lot of computing power. Using WNS is a significant enhancement.

Authentication protocols

The authentication protocols depend on which version of SharePoint you are using.

• SharePoint Server 2019 uses NTLM.
• SharePoint in Microsoft 365 uses FedAuth.

Syncing different file types

OneDrive handles sync differently depending on the type of file.

For Office 2016 and Office 2019 files, OneDrive collaborates directly with the specific apps to ensure data are transferred correctly. If the Office desktop app is running, it will handle the syncing. If it is not running, OneDrive will.

For other types of files and folders, items smaller than 8 MB are sent inline in a single HTTPS request. Anything 8 MB or larger is divided into file chunks and sent separately one at a time through a Background Intelligent Transfer Service (BITS) session. Other changes are batched together into HTTPS requests to the server.

The underlying technologies

The OneDrive sync app uses the following to sync files:

• To find new changes and upload information: https://<tenant_name, i.e. contoso>-my.sharepoint.com/personal/<user_contoso_onmicrosoft_com>/_api/SPFileSync/sync/<default document library ID GUID>/

• To download items: https://<tenant_name, i.e. contoso>-my.sharepoint.com/personal/<user_contoso_onmicrosoft_com>/_layouts/15/download.aspx

• To discover the sites and organizations a user can access: https://odc.officeapps.live.com/odc/servicemanager/userconnected

Security and encryption

File chunks are stored in multiple containers in Azure, each of which is given a unique key. Each key is required to reassemble the complete file. There's also a separate master key encrypting each file chunk key, ensuring the data remain secure even when not moving.

Related topic

I’ve just had a Staff member move all her documents to OneDrive for Business, install the Mobile App, accessed from File Explorer and from her web browser. She loves it – no more clunky VPN to access files on our server. #winning

BUT – she experienced an issue where OneDrive told her all her files were up-to-date, but some of the Folders in File Explorer continued to show the Status of syncing. Annoying – Yes. Casting doubt on the whole syncing situation – Yes. We had to resolve this.

Naturally we searched for solutions – found and tried several, until the following one worked for us. Thanks to a solution provided by David Lodge here – we were able to delete the hidden temporary files which were causing the friction for her.

Some hidden temporary files in those OneDrive folders were causing File Explorer to display the Syncing status – my assumption is that those temp files weren’t being synced to the cloud – because the staff member was looking at her documents and comparing she could see her files in the cloud and in File Explorer.

The solution was to change File Explorer Folder Options view settings so those hidden temporary and system files could be seen and removed.

How to Temporarily change the Folder view options as follows (Windows 10):

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1. In File Explorer ribbon click: View Tab > Options > Change folder and search options
2. In the Folder options window open the View Tab
3. Select the radio button for “Show hidden files, folders, and drives“
4. Uncheck the box that shows “Hide protected operating system files (Recommended)“
5. Click OK
6. Browse through each folder still syncing in File Explorer and remove all locked/corrupted temp files and the folder will show as synced
7. Reverse the folder options selected above when done.

While this may not be what’s causing your issue, I know we tried a number of things which didn’t work for us including:

• pausing and restarting the OneDrive sync
• renaming the folder
• restarting the computer
• running Windows updates

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Hope that’s helpful and David Lodge if you were in Cairns I’d buy you a beer!

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