Workarounds available
Microsoft says it’s currently working on a fix to mitigate the Remote Desktop connection failures, and until one is available, it provides affected organizations with two temporary workarounds.
The first requires disallowing connections over pipe, and port pipeRpcProxy3388 through the RD Gateway (you can do this using firewall software).
The second workaround requires editing the RDGClientTransport registry key under Terminal Server Client by going to HKCUSoftwareMicrosoftTerminal Server ClientRDGClientTransport using the Windows Registry Editor. Next, Find the’ DWORD’ registry key and set the ‘Value Data’ field to ‘0x0’.
Make a registry backup before editing this key to ensure you have an easy way to restore it if anything goes wrong.
Two years ago, Microsoft had to fix a known issue causing RDP and VPN connectivity problems on Windows Servers with Routing and Remote Access Service (RRAS) enabled after installing the June 2022 security updates.
In January 2022, it also issued an emergency out-of-band update to address a Windows Server bug causing Remote Desktop connection and performance issues.
