Mozzie Solutions Limited

I need to close the Microsoft Outlook application on a workstation before a backup job is began, is there any pre-command to do so?

Yes, you can try the pre-command similar to the example as shown below:

Example:
TASKLIST | FIND "OUTLOOK.EXE"
if errorlevel 1 goto end
if errorlevel 0 taskkill /im outlook.exe /F
:end

Save the commands above in the file called CloseOutlook.cmd, and then specify the corresponding working directory and command in the Command Line Tool module.