Problem connecting to Azure P2S VPN (Error 720)

Problem

When setting up a P2S connection to Azure using the Windows VPN client you receive Error 720: A connection to the remote computer could not be established.  You might need to change the network settings for this connection.

Resolution

On your workstation:

• Open Device Manager
• Go to Network adapters
• Right-click the WAN Miniport [protocol] and select Properties
• Select Uninstall device

• Repeat the above for each WAN Miniport driver installed
• Reboot your PC

• Re-open Device Manager
• Right-click Network adapters and select Scan for hardware changes

Retry your Azure VPN connection. This time is should connect successfully.

For more information, see Connect to a VNet using P2S VPN & certificate authentication: portal – Azure VPN Gateway | Microsoft Docs