Why is 'Scan OU Recursively' greyed out when scanning the domain with GFI LanGuard? Author: Luis Fernandes November 30, 2018 04:26 Updated Answer The option 'Scan OU recursively' is only available if you open the Properties of any OU. By default, Network Discovery scans the whole domain, including all the OUs. The check box is used to synchronize a specific OU and the sub-OUs. Related articles Disabling Network Discovery in GFI LanGuard GFI LanGuard Process of Determining the OU of a Computer The offline update option is greyed out in GFI LanGuard Access Denied Error While Attempting a Device Scan What 3rd party products does GFI LanGuard offer major / minor version upgrades for?