Windows 10 Shadowing a session via RDP

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ddywz

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Trying to RDP from a windows 10 pro to another windows 10 pro workstation over the internet. I am using the command:

mstsc /v:<IP address of the remote desktop> /control /prompt

Because internet is involved I use the external IP of the destination workstation and have done a port forward TCP3389 on its router. Everything works fine. I add the credentials ( I have used /prompt options ) and other user1 gets prompted to allow or not the connection. After current user1 allows for remote user to come in, remote user2 logs on fine and gets its desktop. So far so good.

I now remotely try to shadow the same session where user1 is logged in ( knowing the session ID) and run this command:

mstsc /v:<IP address of the remote desktop> /shadow:SessionID /control /prompt

After entering the credentials I get message that says "Invalid computer name"

I have also changed the Allow Remote RPC setting to 1 in the registry \HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Terminal Server of the destination workstation.

Again remote RDP via internet works fine but shadowing the same session ID does not work and says "Invalid PC name"

I tried this same thing and it works if both workstations are on same LAN but once one is over the internet then It complains for "Invalid computer name"


Any idea how to fix this or where the problem is?


Thanks,

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