Veeam Support Knowledge Base
SharePoint Online and OneDrive for Business Backup Jobs Fail with (403) Forbidden Warning Message

SharePoint Online and OneDrive for Business Backup Jobs Fail with (403) Forbidden Warning Message

KB ID:	3104
Product:	Veeam Backup for Microsoft 365 \| Veeam Backup for Microsoft Office 365 3.0 \| Veeam Backup for Microsoft Office 365 4.0 \| Veeam Backup for Microsoft Office 365 5.0 \| 6.0 \| 7.0
Published:	2020-02-13
Last Modified:	2023-03-16

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Challenge

SharePoint Online or OneDrive for Business backup jobs fail with the following message:

Processing site https://site.sharepoint.com/sites/111/subsite finished with warning: 
Failed to backup item version: //1024/Shared Documents/, version: 2.0, 
The remote server returned an error: (403) Forbidden. :: 0:00:21

Cause

Due to limitations of file version history, files cannot be downloaded.

Solution

To confirm the limitations of history of file versions, do the following:

Open the affected OneDrive or Site in the Web-browser.
Find the file that cannot be downloaded and open Version history.
Left-click the date.
- If the 403 error appears, that means that the file is inaccessible in Office 365. Make sure to contact Microsoft Technical Support.
- If you are getting any other error, contact Veeam Technical Support.

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