This recently started popping up if i run a Get-RDRemoteApp. Regardless if i query the whole collection or a specific application i get this warning. Not sure if this is from a deleted account and is a lingering SID, but i cant query that SID in AD. Not sure where to go to clean this up or find the root cause. Any pointers? (RDS environment is all Server 2016, each function on its own set of HA servers, CB's,WB/GW, Lic and DBs.)
Thanks.