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For security reasons, a number of file names and extensions can't be uploaded since they are executable, used by SharePoint Server, or used by Windows itself.
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Why can’t I share an item?
You can't synchronize the Shared with me view grouping of files from a OneDrive for work or school site.
Error messages:
You can’t share this item because too many items have already been shared in this library
There is a limit of 50,000 items that can be shared within a folder and any sub-folders.
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To overcome this restriction, move some items into another folder that is not within the original folder, or choose individual files to share.
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You can't synchronize the Shared with me view grouping of files from a OneDrive for work or school site.
Delivery has failed to these recipients or groups error when sharing
You may receive this error message when trying to share to an address that is not associated with a Microsoft account.
How many OneDrive accounts can I have?
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Read how to Move a OneNote notebook to OneDrive.
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Can I sync network or mapped drives?
You can't add a network or mapped drive as your OneDrive sync location. OneDrive doesn't support syncing using symbolic links or junction points.
Elevated privileges
OneDrive can’t be run with elevated privileges, and you will not be able to see OneDrive menu items within File Explorer. However, the per-machine sync app installation is helpful, especially for multi-user computers and when you don’t want exe files running from the user profile. See also Unable to share OneDrive files.
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Although SharePoint can store 30 million documents per library, for optimum performance we recommend syncing no more than 300,000 files across all document libraries. Performance issues can occur if you have 300,000 items or more across all libraries that you are syncing, even if you are not syncing all items within those libraries.
Notes
If you are uploading, downloading, or moving a large number of files at once, you may need to wait an extended period of time before the sync process can complete. The desktop app showing “syncing” icon or displaying "processing changes" during this period is not necessarily an indication of a problem. You can always click the OneDrive taskbar icon to see the status of content that is in the process of syncing. To help reduce sync times, we recommend reviewing and possibly modifying your bandwidth settings before starting your upload or download. You can also read how to Choose which OneDrive folders to sync to your computer.
There are other SharePoint limits on viewing a document library using the web that may affect how you structure your files in OneDrive.
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Admins: Learn how to configure the Azure Rights Management service. |
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Is differential sync available for all file types?
Differential sync is possible for Microsoft Office files in the new file format, .docx, .pptx, .xlsx. This is part of Office integration and requires that you have:
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For optimum performance, we recommend storing no more than 300,000 files in a single OneDrive or team site library.
Additionally, relevant to OneDrive Sync, the same performance issues can occur if you have 300,000 items or more across all libraries you are syncing, even if you are not syncing all items in those libraries. The 300K file “soft” limit for OneDrive Sync also applies to shortcut folders
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How are libraries with specific columns or metadata synced?
If you have libraries with Checkout or Validation columns, or when Draft Item Security is set to either Only users who can edit or Only users who can approve items in Version Settings of the library:
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How do I remove sync-blocking column settings?
Windows
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restrictions and limitations
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File Explorer displays the first 35 characters of a site library’s name and site name combination for a library that you have synchronized. This doesn’t affect the ability to sync these items within the limits that are described in this article.
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OneDrive Files On-Demand is supported on Windows 10 2017 Fall Creators Update and later versions, or Windows Server 2019 and later versions, or Mac OS X Mojave (10.14) or newer.
macOS specific macOS restrictions and limitations
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