Windows XP backup using Group Policy

By Group Policy I think not... or at least not directly... you could use instead a script that could be run at log-on or log-off and you can use the command0line reference to set the necesarry parameters to do the backup as you wish...

To access the "command line" reference just type at a command prompt: NTBACKUP /? and will show you all the options.

Can you give some more details for logon script?

I want to create a scheduled backup job in all workstations to backup "My Documents" folder to "\\servername\user_data\" on specific times.

Is is possible to do so via a logon script?

OR Group Policy?

You can use this script, you can name it ScheduleBackup.VBS

And you cand set it in you Log-On script... it masically use te AT command to schedule the NTBACKUP command.

set objShell = createObject("WScript.Shell")

cTime="20:05"
cBackupFolder="c:\bitware"
cBackupOptions=" /j 'Logon-Backup Job' /a /f '\\ang-dc-01\migrare\SpecialBK.bkf' /m copy"
cCommand="at " & cTime & " ntbackup backup " &  cBackupFolder & cBackupOptions

objShell.Run(cCommand)

wscript.echo "Backup scheduled"

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Sorry for the typos from above... but this script maybe is more "generic" and you can adapt as you like and maybe you want to comment or delete the "echo" line that was used just to make shure the AT command run succesfully - you can check in the "Scheduled Tasks" it there is an AT cron job set to runt at desired time - and note that this command will be run only once at that time so use NTBACKUP /? to see how to set the time/date to suit your needs.

set objShell = createObject("WScript.Shell")

cTime="20:05"
cBackupFolder="FolderToBackup"
cBackupOptions=" /j 'Logon-Backup Job' /a /f '\\ShareToSave\BackupName.bkf' /m copy"
cCommand="at " & cTime & " ntbackup backup " &  cBackupFolder & cBackupOptions

objShell.Run(cCommand)

wscript.echo "Backup scheduled"

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Thanks. I'll give it a try after the weekend.