Please note I was backing up Cellera NAS volumes and encountering authorisation problems against UID. The solution was to upgrade to TSM 4.1 client, there were various extra Microsft components to install prior to TSM agent installing successfully. Files backed up & restored successully now. Can anyone comment about running 4.1 client on 3.7.3 server.........?????????? > Nigel Wakefield. > Backup & Recovery Engineer >