How to enable support for TLS 1.2 in Windows 7 and Windows 8.1

Starting July 1, 2018, support is being removed for TLS 1.0 and 1.1 from Azure VPN Gateway. VPN Gateway will support only TLS 1.2. To maintain support, see the updates to enable support for TLS1.2.

How to enable support for TLS 1.2 in Windows 7 and Windows 8.1:

Open a command prompt with elevated priveleges by right-clicking on Command Prompt and selecting Run as administrator.

Run the following commands in the command prompt:

reg add HKLM\SYSTEM\CurrentControlSet\Services\RasMan\PPP\EAP\13 /v TlsVersion /t REG_DWORD /d 0xfc0
reg add "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\WinHttp" /v DefaultSecureProtocols /t REG_DWORD /d 0xaa0
if %PROCESSOR_ARCHITECTURE% EQU AMD64 reg add "HKLM\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Internet Settings\WinHttp" /v DefaultSecureProtocols /t REG_DWORD /d 0xaa0

Install the following updates:

KB3140245
KB2977292
Reboot the computer.

Reference: https://docs.microsoft.com/en-us/azure/vpn-gateway/point-to-site-about