Fetching AD records

When you install the Viewer on a computer that belongs to Active Directory network, the Viewer fetches the AD tree automatically and displays it in the Navigation pane:

Active Directory tree in Viewer

You can add additional domain controllers using the Add domain controller dialog.

You can disable showing the Active directory tree. Open the Viewer, click ToolsOptions, navigate to the Misc tab and enable the Hide default domain controller checkbox.

Viewer options, Misc tab