I've got a constant error in my DDC event logs that the "The Citrix Broker Service failed to contact virtual machine 'S-1-6-52-.........' (IP address )." This references a physical device that may have been used as a remotePC. The SID and machine name do not show up in studio or when running get-brokermachine get-brokerdesktop -machinename. However when running the same command with -SID it just returns nothing but does not say object not found. I'm trying to remove this as it's cluttering up the system log and tried "get-brokermachine -sid S-1-6-52-....... | remove-brokermachine. This doesn't error out but i'm still getting errors and the get-broker commands with SID still dont say object not found. Any tips on removing this "ghost" SID/desktop from my site?