Windows 11 22H2 - Bug RDP

big problems with RDP connections

Following the problems encountered by many users with “Remote Desktop” connections under Windows 11 22H2, Microsoft is doing research on its side to fix this new bug. Let’s do a check in.

Following the installation of Windows 11 22H2, the Windows Remote Desktop client is acting up on workstations equipped with this version of Windows. Indeed, it randomly disconnects, crashes or even worse, it does not even connect to the remote server. Many testimonials are readable on the forum

For instance, a Windows admin claims : “All of our Remote Desktop users using Windows 11 are having issues connecting to Remote Desktop after installing this update. It hangs on login.

Another example : “We discovered that there is a bug in the Remote Desktop client, which only tries the UDP connection and not the TCP connection. We only allow connection through port 443 on our firewall.” – Or : “I have several clients running Windows 11, and after the 22H2 update they were unable to connect to our RDS servers. I tried without the firewall, but nothing changed. The problem disappeared after the rollback, they were able to connect again.

RDP access is widely used in business, especially to access application servers, so we can imagine that this bug poses serious problems for some organizations.

What is the solution to correct this problem?

Although there is no official patch from Microsoft, there is still a solution in the meantime. So yes, you can go back and revert to the previous version of Windows, but it’s not the easiest solution to implement on a set of machines… You can also disable UDP connections in Windows RDP client. Thus, the RDP client has no choice but to connect in TCP.

On affected Windows 11 22H2 machines, you need to do the following:

1 – Open Windows Registry Editor

2 – Access the key: HKLM\SOFTWARE\Policies\Microsoft\Windows NT\Terminal Services\Client

3 – Create a new DWORD value named “fClientDisableUDPwith the value 1

4 – Restart the machine

You can also deploy this registry key by GPO or from a command line:

reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows NT\Terminal Services\Client" /v fClientDisableUDP /d 1 /t REG_DWORD

There is also a GPO setting named “Disable UDP on the client” and located at this location:

Configuration ordinateur > Stratégie > Modèle d'administration > Composants Windows > Services Bureau à distance > Client Connexion Bureau à distance

RDP - Disable UDP by GPO

Have you encountered this problem on your side?


Logiciel – OS,Microsoft,Windows 11,

#big #problems #RDP #connections

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