I’ve seen something similar to this before in remote desktop servers where user redirected printers end up bloating registries to the point login times exceed processing limits and so not all the configuration in the registry or group policy gets processed. Each redirected printer gets created and never pegged, and it’s unique to that rdp session so they are duplicated to infinity over time. Glad you found it out, the only point with the complexity is I was trying to explain that it being complex doesn’t mean it won’t be robust if it’s still implemented without conflicts so you can rule that out (if you’ve ruled out conflicts) . Sounds like you found the culprit in the end! Good work.