When using the general S3 Integration there is no such box.
This wouldn't be an issue, you can just set the default storage class in your S3 Bucket.
But, the issue is that veeam always sends the
header when uploading objects. This overrides whatever default is set in the bucket.x-amzstorage-class:standard
Unfortunately I see no option to remove this header or am I missing something?
Theoretically it would be better if veeam did not send any storage class header at all, then the bucket default would go into effect.