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For example, if the file URL in SharePoint is https://www.contoso.com/sites/marketing/documents/Shared%20Documents/Promotion/Some%20File.xlsx, the limit applies to “sites/marketing/documents/Shared Documents/Promotion/Some File.xlsx.”
Likewise, if the file URL in OneDrive is https://contoso-my.sharepoint.com/personal/meganb_contoso%20_com/_layouts/15/onedrive.aspx?id=%2Fpersonal%2Fmeganb%5Fcontoso%5Fcom%2FDocuments%2FContracts%2FVendor%20Quotations/Some%20File.xlsx, the limit applies to “personal/meganb_contoso_com/Documents/Contracts/Vendor Quotations/Some File.xlsx.”
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Each segment of the path (a segment is a file name or folder name like “Promotion” or “Some File.xlsx” in the examples above) can't be more than 255 characters due to operating system limitations.
The length of the OneDrive root folder (e.g. C:\users\meganb\OneDrive - Contoso) + the relative path of the file (up to 400 charscharacters) cannot be more than 520 characters.
The organization name can be updated in the M365 admin center but that will not propagate to existing Sync relationships (only newly established ones). For existing Sync relationships to have the new organization name, users need to unlink and relink their accountaccounts.
SharePoint Server versions only support up to 260 characters for file and path lengths, Microsoft Excel and older Office version versions have a lower limit, see KB 326039 for details.
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