Hi, Since last update to 4.17, virtualmin servers backup fails with ".. upload failed! cp: failed to preserve ownership for "domain.tar.gz.info" : Permission denied"
Backup is made from CentOS6 to Synology NAS mounted as Linux directory.
It seems related to change in the latest Virtualmin version "Fixes an Apache configuration permissions issue that prevented backup restoration in some circumstances."
I suppose that virtualmin is attempting to change permissions on drive that does not support permissions changes.
Not to stress you too much, but its a pretty urgent bug.