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In Windows you can use the Preview Include-Exclude option in the backup client.
Start the backup client and go to the utilities menu and select Preview Include-Exclude bacclientutilitiespreviewinclude.png
In the Preview Include-Exclude Dialog, choose the type either Backup or Archive -- your normal nightly jobs will usually be of type Backup
Choose either to just show included files, excluded files or both. This information is ascertained from settings in your dsm.opt file.
Choose the directories and files to be reported on. If you have a large file system and you choose a top level directory this command may take a long time to run and produce a large output file.
When the task finishes open the output file with notepad and it will look as follows with the files on the left and the management class on the left hand side. previewincludeexcludeoutput.png
The same preview include-exclude can be achieved with the backup-archive command line in both unix and windows as follows. This example will produce the same out as above. previewincludeexcludecmdline.png
The -traverse=y option tells the backup-archive client to include subdirectories.