Microsoft's July Update Might Break RDP Connections - Microsoft

Windows Servers might affect Remote Desktop Connectivity across an organization if legacy protocol (Remote Procedure Call over HTTP) is used in Remote Desktop Gateway. Resulting from this, remote desktop connections might be interrupted.

This issue might occur intermittently, such as repeating every 30 minutes. At this interval, logon sessions are lost and users will need to reconnect to the server. IT admins can track this as a termination of the TSGateway service which becomes unresponsive with exception code 0xc0000005.

Option 1: Disallow connections over pipe, and port \pipe\RpcProxy\3388 through the RD Gateway. This process will require the use of connection applications, such as firewall software. Consult the documentation for your connection and firewall software for guidance on disallowing and porting connections.

Option 2: Edit the registry of client devices, by removing a key related to RDGClientTransport

Important: This article contains information about how to modify the registry. Make sure that you back up the registry before you modify it. Make sure that you know how to restore the registry if a problem occurs. For more information about how to back up, restore, and modify the registry, see How to back up and restore the registry in Windows .

Open the Windows Registry Editor and navigate to the following registry location:
HKCU\Software\Microsoft\Terminal Server Client\RDGClientTransport

Find the registry key titled ‘DWORD’ and set the ‘Value Data’ field to ‘0x0’.

Next steps: We are working on a resolution and will provide an update in an upcoming release.

Source : https://support.microsoft.com/en-us/topic/july-9-2024-kb5040437-os-build-20348-2582-5b28d9b8-fcba-43bb-91e6-062f43c7ec7c