Enumerate logon sessions remotely

Question

I want to enumerate logon sessions on a remote host (citrix terminal server). What I found so far is LsaEnumerateLogonSessions() / LsaGetLogonSessionData(), but you can't call it remotely.
I read some docs about RPC, but if I understood it right, you need an extra application on the remote host that executes your functions (that's something I want to avoid).

Is there a way to implement such a thing? Maybe with the remote desktop api?

Another solution I found: http://msdn.microsoft.com/en-us/library/windows/desktop/aa370669%28v=vs.85%29.aspx

Answer 1

Use Win32_LogonSession, it is possible to call WMI from a remote computer.

Answer 2

Other options include the WTS APIs: WTSEnumerateSessionsEx. If you want to be Citrix specific you can also use the XenApp PowerShell SDK.