Operational Defect Database
BugZero found this defect 1118 days ago.
Data sources
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Veeam | kb4156
"The remote server returned an error: (403) Forbidden. Access denied" when performing Veeam Backup for Office 365 backup
Last update date:
5/11/2021
Affected products:
Veeam Backup for Microsoft 365
Affected releases:
5.0
Fixed releases:
No fixed releases provided.
Description:
Challenge
Backup and restore operations in Veeam Backup for Microsoft 365 fail with the error: "The remote server returned an error: (403) Forbidden. Access denied"
Cause
Recent changes made by Microsoft to their APIs have impacted certain authentication queries that are used in versions of Veeam Backup for Microsoft 365 prior to build 5.0.1.225.
Solution
Users must upgrade to latest version with Veeam Backup for Microsoft 365 5b cumulative patch KB4135. The newest product build leverages different API queries which help to avoid the permission issue which takes place in older builds. If after upgrading to Veeam Backup for Microsoft 365 5b (5.0.1.225) the error still occurs please create a support case and provide a full log bundle.
More Information
Veeam Backup for Microsoft 365 5b cumulative patch KB4135 Veeam Backup for Microsoft Office User Guide - Collecting Log Files - the link.
