This article provides clarification and a workaround for the newly detected known issue with OU based scanning in LanGuard 12.5.
LanGuard 12.5 was released on January 14th, 2020, with an update to the scanning functionality, which resolved issues with NTLM being disabled. We have recently had reports that this fix has had unintended consequences with the interaction of scanning devices via OU. Due to the detection mechanisms in place, OU scanning is currently not working as a result of this fix.
We are currently working with Engineering to resolve the OU detection and return scanning by OU.
Scanning still works when scanning by individual device, or by attributes. Creating a new scan to scan by a list of machines or by group attributes will allow the devices to be scanned in groups rather than by individual OU.