Known errors, warnings, workarounds and fixes for Microsoft OneDrive for Business backups with M365 backup powered by Veeam


TABLE OF CONTENTS


Description

Here is a list of known workarounds and fixes for warnings and errors you may get in your backup reports for Microsoft OneDrive for Business.



 

Warning : Processing OneDrive XXXXXXXXXXXX finished with warning: Failed to backup item: xxxxxxxxxxxxxxxxxxxxxxx, Item may have a virus reported by the virus scanner plug-in

 

Cause :

Items being backed-up may be blocked by the internal OneDrive antivirus. For more information, see this Microsoft article.


Solution :

To validate if any items are infected, open the Microsoft OneDrive account which cannot be backed up and try to download the files manually. Files considered malicious are blocked from downloading. For more information, see this Microsoft article.

 

 

 

Error: The identity of the calling application could not be established.


Cause :

The enterprise application named "M365 backup powered by Veeam" was deleted in Azure AD. Backup jobs cannot run without this application.


Solution :

Please contact our support team. We will have to proceed with the Microsoft tenant setup again in the backend using a user with the Global Administrator role.






Error: A configuration issue is preventing authentication. The certificate with identifier used to sign the client assertion is expired on application.

 

Cause :

The certificate used by the backup application in Microsoft Entra is expired.


Solution :

Please provide us the following so we can deploy a new backup application in Microsoft Entra:

  • A new certificate in a PFX format
  • The password protecting the certificate
  • The Microsoft tenant to update
  • User credentials (with the Global Administrator role) in the Microsoft tenant