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 How to scan for just missing Microsoft patches using GFI LanGuard Antivirus applications are not detected with GFI LanGuard You are unauthorized to access this area of GFI LanGuard Central Management Server Why does Windows update list patches that are not in GFI LanGuard? Does the GFI LanGuard Active Directory Synchronization feature work automatically?