#1 Global Leader in Data Resilience
#1 Global Leader in Data Resilience
TRY NOW
book meeting
BACK TO KB LIST

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

KB ID: 3104
Product: Veeam Backup for Microsoft 365 | 6.0 | 7.0 | 7a | 8 | 8.1 | 8.2
Veeam Backup for Microsoft Office 365 | 3.0 | 4.0 | 5.0
Published: 2020-02-13
Last Modified: 2025-10-20
mailbox
Get weekly article updates
By subscribing, you are agreeing to have your personal information managed in accordance with the terms of Veeam's Privacy Notice.

Cheers for trusting us with the spot in your mailbox!

Now you’re less likely to miss what’s been brewing in our knowledge base with this weekly digest

error icon

Oops! Something went wrong.

Please, try again later.

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: 1.0, 
The remote server returned an error: (403) Forbidden. :: 0:00:21

Cause

This occurs due to limitations in the file version history, which prevents the file from being downloaded.

Solution

To investigate the limitations of file version history, do the following:

  1. Open the affected OneDrive or SharePoint Site in a web browser.
  2. Locate the file that cannot be downloaded and open its Version History.
File management window showing two text files, "Ipsum.txt" and "Lorem.txt." The context menu for "Ipsum.txt" is open, with the "Version history" option highlighted at the bottom.
  1. In the Version History window that pops up, left-click the version specified in the warning.
"Version history" panel showing two versions of a file. Version 2.0, modified on 10/20/2025 at 1:20 PM, and version 1.0, modified on 10/10/2025 at 9:19 PM. A cursor points to version 1.0.
  • If a 403 error occurs, that means that the file is inaccessible in Office 365. Contact Microsoft Technical Support for futher assistance.
  • If the file opens without issue, or if an error other than 403 occurs, contact Veeam Technical Support.

If this KB article did not resolve your issue or you need further assistance with Veeam software, please create a Veeam Support Case.

To submit feedback regarding this article, please click this link: Send Article Feedback
To report a typo on this page, highlight the typo with your mouse and press CTRL + Enter.

Spelling error in text

Thank you!

Thank you!

Your feedback has been received and will be reviewed.

Oops! Something went wrong.

Please, try again later.

You have selected too large block!

Please try select less.

KB Feedback/Suggestion

This form is only for KB Feedback/Suggestions, if you need help with the software open a support case
By submitting, you are agreeing to have your personal information managed in accordance with the terms of Veeam's Privacy Notice.
Verify your email to continue your product download
We've sent a verification code to:
  • Incorrect verification code. Please try again.
An email with a verification code was just sent to
Didn't receive the code? Click to resend in sec
Didn't receive the code? Click to resend
Start using Veeam:
Download the product
&
Activate the license key
Thank you!

Thank you!

Your feedback has been received and will be reviewed.

error icon

Oops! Something went wrong.

Please, try again later.