The All Computers report provides the details of all the computers within the selected Domain (s). For the domains to be listed here, you should have added all the domains from the Domain Settings page. The steps below will guide you to generate an All Computers report.
Select the AD Reports tab.
Select Computer Reports from the left pane to get the Computer Reports page.
Select All Computers link under General Reports.
Select the Domain and the associated OUs for Report Generation.
Click Generate button
Note: Use Add OUs link to select specific OUs in the selected Domain (s).