Backup all client desktop's task

Hello.

I would to create task on server to backup all client users desktop. It is possible?

I tried to do it this way:
Default directories to backup: %USERPROFILE%\Desktop
but in log i have:

Starting scheduled full file backup…
Cannot access path to backup: “\?\GLOBALROOT\Device\HarddiskVolumeShadowCopy27\ERPROFILE%\Desktop” Errorcode: 3 - System nie może odnaleźć określonej ścieżki.
Hint: The path to backup contains Windows environment variables. This is not supported. UrBackup Clients runs as user independent system service. See https://www.urbackup.org/faq.html$rinclude_files for what you probably want to do.
Hint: Directory to backup (“%USERPROFILE%\Desktop”) does not exist. It may have been deleted or renamed. Set the “optional” directory flag if you do not want backups to fail if directories are missing.
Constructing of filelist of “tomek” failed: error - index error
Backup had an early error. Deleting partial backup.

Regards, Tomasz.

Please try this:

Users\:\Desktop\*