If the backup report shows "Access Denied" errors or messages about resources of shared locations not being accessible then it is difficult to obtain further 'reasons' without a little investigation. This is often because the backup software simply reports the error message given to it by the operating system. This article may be useful in identifying the cause:

• Log into the backup manager website (or the actual client if preferred) and navigate to the "Backupset" properties
• In the "Backup source" section note the offending source location that caused the error (for example, \\shared\docs or "S:\docs")
• Create a folder of drive C:\ called "OSBM" create a file named "preBackup.cmd"
• Edit the file in Notepad and type this command:
  • xcopy S:\temp\share\*.* c:\OSBM\sharedCopy\ /E /I /F /G /H /R /Y
  • Replace "S:\temp\share" with the actual source location that you noted in step 2
  • Save the file
• Open a command prompt (Start > Run > CMD) and type the followin command:
  • C:\OSBM\preBackup.cmd
  • Press 'Enter' key and observe results
  • If any errors are reported then you'll need to isolate the cause; the backup software cannot access files if you can't
  • If no errors were experienced then the credentials with which you are logged in clearly have permission to access the files
    • In the backup manager website locate the section (under "Backupset") called "Network Resources Authentication for Windows"
    • Populate your currently logged-on credentials into the appropriate fields and save the configuration (click "Update")
• Final solution?
  • Here's a work-around in case of unusual diffuculties:
  • If the command "preBackup.cmd" will copy the files manually then specify that command as a pre-backup command
    • In the backup manager website locate the section (under "Backupset") called "Pre-backup command"
    • Populate the fields as follows:
      • Name: preBackup
      • Command: C:\OSBM\preBackup.cmd
      • Working Directory: C:\OSBM\
    • This will make a local copy of the inaccessible shared files
    • In the backup manager website (under "Backupset") remove the offending source location that you noted in step 2
      • Replace it with "C:\OSBM\sharedCopy"
      • Save ("Update") the backupset configuration

Any further queries?
Raise a ticket with 123vISP Support