I am trying to create a remote desktop child session. I can successfully create one on my laptop. I tried on AWS with Windows Server 2016 Datacenter and it was failing. Calls to WTSEnableChildSessions and WTSIsChildSessionsEnabled returned false. However, after some time it started working and I don't know why, but I believe it has something to do with configuration. I am now trying to replicate on another server and failing.
My question is, what is needed to enable a child session?
Code I am using to create child session
Object obj = this.rdp.GetOcx();
IMsRdpClient8 msRdpClient = this.rdp.GetOcx() as IMsRdpClient8;
msRdpClient.AdvancedSettings9.EnableCredSspSupport = true;
MSTSCLib.IMsRdpExtendedSettings extSettings = rdp.GetOcx() as MSTSCLib.IMsRdpExtendedSettings;
extSettings.set_Property("ConnectToChildSession", True);
rdp.Connect();
I have gone through following links to no avail, did I miss anything
https://learn.microsoft.com/en-us/windows/win32/termserv/child-sessions
https://learn.microsoft.com/en-us/windows/win32/api/wtsapi32/nf-wtsapi32-wtsenablechildsessions
https://learn.microsoft.com/en-us/windows/win32/api/wtsapi32/nf-wtsapi32-wtsischildsessionsenabled