Why is 'Scan OU Recursively' greyed out when scanning the domain with GFI LanGuard? Author: Luis Fernandes October 27, 2020 18:34 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 Why did LanGuard not import the OU when synchronizing with AD? Fixing GFI LanGuard Broken Installation or Failed Upgrade Creating a New SQL Database in GFI LanGuard GFI LanGuard Process of Determining the OU of a Computer