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For information about creating user and host groups to be used with the user and host group reports, see section 6.10, User and host groups.
When you run the xfcustomreport utility, it outputs both CSV and HTML files you can view in a browser.
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You run the utility from the directory where you want to place the output. For more about how to set up the custom report utility, see section 3.4, Custom report utility.