Issue
When trying to connect a windows VPN through Windows 10 you get a generic error about an error connecting to remote server and you have verified all settings for VPN are correct.
If you check the event logs there is a error similar to below with a failure 720 error.
“The user [Domain]\[Username] dialed a connection named My VPN which has failed. The error code returned on failure is 720.”
Cause
Unknown windows issue
Fix
- Go to device manager and uninstall all Network adapters that start with WAN Miniport.
- Right click on top level computer name and scan for hardware changes. This will install the WAN miniport adapters again
- Try the VPN again and it should work.
