Challenge
The following error occurs when creating a folder in the S3-Compatible Object Storage bucket: "Unable to create folder (name: <folder_name>)".
Cause
Certain S3-compatible API do not support an unsigned payload used by Veeam Backup for Microsoft Office 365 as the x-amz-content-sha256 authorization header. Applicable to builds: 4.0.0.1345, 4.0.0.1553.
Solution
Upgrade the Veeam Backup for Microsoft Office 365 server to version 4.0b (build 4.0.0.2516) or contact technical support to get a patch for version 4.0a (build 4.0.0.1553).
More Information
Veeam Backup and Replication and the S3-Browser tool (a 3rd party tool for S3 storage) are not affected.