On the client you could run netstat -aonb then look for the process mstsc.exe and check foreign address port is 3389 or 443
--please don't forget to upvote
and Accept as answer
if the reply is helpful--
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In a lab environment based on Windows Server 2019 I installed and configured Remote Desktop web client and it works fine.
I used information from page https://learn.microsoft.com/en-us/windows-server/remote/remote-desktop-services/clients/remote-desktop-web-client-admin
How can I show and demonstrate that my Windows 10 client is using HTTP instead of RDP?
Regards
On the client you could run netstat -aonb then look for the process mstsc.exe and check foreign address port is 3389 or 443
--please don't forget to upvote
and Accept as answer
if the reply is helpful--
Many thanks for the answer.
Let me ask for some further information.
Base on my test, if I use the RDP client netstat -aonb shows mstsc and the port.
If I use the web client I don't see anything: is it correct?
Regards