On Windows 11 devices, a certificate validation issue may occur when establishing an SSTP VPN connection. In this case, it may be necessary to disable the certificate revocation check during the connection process.
To apply this change, a value must be added to the Windows Registry, and then the computer must be restarted.
1. Open Command Prompt as Administrator
Click the Start button at the bottom of the screen.
Type the following into the search box:
cmd
The Command Prompt option will appear in the search results.
Right-click Command Prompt.
Select Run as administrator from the menu.
If the User Account Control window appears, click Yes.
2. Run the Required Command
Copy the following command exactly:
reg add "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SstpSvc\Parameters" /v "NoCertRevocationCheck" /t REG_DWORD /d 1 /f
Paste the command into the Command Prompt window by right-clicking or pressing Ctrl + V.
Then press Enter.
3. Restart the Computer
After running the command, the computer must be restarted for the change to take effect.