I’m getting following entry when starting a kopano-backup in kopano server.log:

Wed Sep 20 15:58:11 2017: [warning] Failed to authenticate user “SYSTEM” from “ip of kopano server” using program “python”

does anyone know about this how to fix this ? (beside the backup complete expect with some errors - but the errors occour only in one mailbox and had this errors in backup before)

Kopano Version 8.3.4-12 on UCS 4.2.2 errata 184