Simple howto.

No additional third side software required. Windows built-in task scheduler used. Username and password arguments NOT required for command.

This assumes you're using Windows 10 built-in VPN and already saved VPN connection (saved username and password). Probably will work on older Windows versions too.

First of all find saved VPN connection parameters file C:\Users\YOURUSERNAME\AppData\Roaming\Microsoft\Network\Connections\Pbk\rasphone.pbk

Make backup.

Then open original and find [YOURVPNNAME].

Find PreviewUserPw=1
Change it to PreviewUserPw=0

Save the file.


Next create new file, copy following content, change keywords in CAPITALLETTERS.

<?xml version="1.0" encoding="UTF-16"?>
<Task version="1.2" xmlns="http://schemas.microsoft.com/windows/2004/02/mit/task">
  <RegistrationInfo>
    <Date>2021-12-30T14:40:51.0713534</Date>
    <Author>DOMAIN\YOURUSERNAME</Author>
    <URI>\VPN reconnect task</URI>
  </RegistrationInfo>
  <Triggers>
    <EventTrigger>
      <Enabled>true</Enabled>
      <Subscription>&lt;QueryList&gt;&lt;Query Id="0" Path="Application"&gt;&lt;Select Path="Application"&gt;*[System[Provider[@Name='RasClient'] and EventID=20226]]&lt;/Select&gt;&lt;/Query&gt;&lt;/QueryList&gt;</Subscription>
    </EventTrigger>
    <EventTrigger>
      <Enabled>true</Enabled>
      <Subscription>&lt;QueryList&gt;&lt;Query Id="0" Path="Microsoft-Windows-NetworkProfile/Operational"&gt;&lt;Select Path="Microsoft-Windows-NetworkProfile/Operational"&gt;*[System[Provider[@Name='NetworkProfile'] and EventID=10000]]&lt;/Select&gt;&lt;/Query&gt;&lt;/QueryList&gt;</Subscription>
    </EventTrigger>
  </Triggers>
  <Settings>
    <MultipleInstancesPolicy>IgnoreNew</MultipleInstancesPolicy>
    <DisallowStartIfOnBatteries>true</DisallowStartIfOnBatteries>
    <StopIfGoingOnBatteries>true</StopIfGoingOnBatteries>
    <AllowHardTerminate>true</AllowHardTerminate>
    <StartWhenAvailable>false</StartWhenAvailable>
    <RunOnlyIfNetworkAvailable>false</RunOnlyIfNetworkAvailable>
    <IdleSettings>
      <StopOnIdleEnd>true</StopOnIdleEnd>
      <RestartOnIdle>false</RestartOnIdle>
    </IdleSettings>
    <AllowStartOnDemand>true</AllowStartOnDemand>
    <Enabled>true</Enabled>
    <Hidden>false</Hidden>
    <RunOnlyIfIdle>false</RunOnlyIfIdle>
    <WakeToRun>false</WakeToRun>
    <ExecutionTimeLimit>PT72H</ExecutionTimeLimit>
    <Priority>7</Priority>
  </Settings>
  <Actions Context="Author">
    <Exec>
      <Command>C:\Windows\System32\rasphone.exe</Command>
      <Arguments>-d "YOURVPNNAME" -f C:\Users\YOURUSERNAME\AppData\Roaming\Microsoft\Network\Connections\Pbk\rasphone.pbk</Arguments>
    </Exec>
  </Actions>
</Task>

Next open Windows Task Scheduler and import this file. New task will be created.

Try to Run/Enable it.

Connect/Disconnect VPN.

If setup is correct, VPN should reconnect right after disconnection.