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Windows 11 2022 Update causes problems for Remote Desktop users

Microsoft is continuously rolling out the Windows 11 2022 Update, but more issues resolve as it reaches more users. One of the biggest unresolved issues now concerns Remote Desktop clients. According to those affected, installing the update prevented their remote desktop on Windows 11 system from connecting (or connecting only to disconnect or crash later).

“All of our remote desktop users using Windows 11 are having issues connecting to Remote Desktop after installing this update. It's all about the connection,” an insider named Jeff Cleath reported on the Microsoft community page. “We discovered that there was a bug in the Remote Desktop client so that it only tries the UDP connection and not the TCP connection. We only allow connection to port 443 on our firewall.

Community users have found a workaround to end the negative impact of Windows 11 2022 on Remote Desktop clients. Apparently it is always suggested to rollback the update. However, for those who still wish to have it, Cleath suggests adding a specific registry setting to allow remote desktop connection to work, which involves disabling UDP connections on clients. To do this, you need to navigate to HKEY_LOCAL_MACHINESOFTWAREPoliciesMicrosoftWindows NTTerminal ServicesClient using Registry Editor. From here, affected users should right-click and create a new DWORD entry named fClientDisableUDP and change its value to 1. To complete the process, a reboot is required. Many users claim that this process quickly fixed the issue.

On the other hand, users can also resort to the Disable UDP on the client policy option without rebooting their machines. Follow the path Computer Configuration > Administrative Templates > Windows Components > Remote Desktop Services > Remote Desktop Connection Client via Group Policy Editor.

Although this suggestion seems to work for many affected users, some still doubt it.

"My understanding is that changing this register to 1 would actually not use UDP," said one user. wrote. “Does anyone know if this would cause 'unreliability' in the RemoteApp connection if left disabled? »

"From my limited understanding, I think UDP allows the RDP connection to stay connected even if it doesn't get an acknowledgment from the remote server, because TCP requires a full handshake between the client and the server before doing anything,” another user commented. “So disabling UDP just means it only uses TCP to connect and needs a stable connection to the server at all times to maintain the handshake. »

Cleath, the insider who suggested the cure, on the other hand, says there is no problem using it on his end. "I've heard from others that changing this registry could cause performance issues with file downloads and video from the remote desktop environment, especially with poor or long distance connections. said Cleath. “Personally, I've been using this setting for about 4 months and haven't had any issues. I have very good remote internet connectivity and am only about 40 miles from the server environment.

At present, Microsoft still does not have an official fix available for the issue, although the company is already aware of the situation. In the meantime, affected users can try the suggestions above or wait for Microsoft's official solution.

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