Terminal Services & rdp-tcp Session

Finally, I've been able to resolve this after a couple of days.

This is what have been done to fix it:

Step I:

Added a new DWORD key named DisableTaskOffload with a value of 1 to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters

Step II:

Changed IPv4 Checksum Offload for PROD NIC in Advanced Settings.

After these changes, no more issues with RDP not been connected at first attempt or performance issues.

When you go to Event Viewer and navigate to: Applications and Services Logs -> Microsoft -> Windows -> TerminalServices-LocalSessionManager and open Operational you will find event 24 in Microsoft-Windows-TerminalServices-LocalSessionManager which will state Remote Desktop Services: Session has been disconnected:

We can use this as a trigger to a delayd task in task scheduler to run a script that resets all disconnected users and log the results in a log file for us to investigate later.

Create the task in Task Scheduler with these specifics configured:

The Edit Action box the Add arguments (optional): portion have this in it:

    -ExecutionPolicy Bypass c:\scripts\disconnect.ps1  

You will have to create two directories:

c:\scripts\
c:\logs\

Then create a file in c:\scripts called disconnect.ps1 and add the contents as below:

disconnect.ps1:

    #.SYNOPSIS
    #   Checks for disconnected sessions and logs off the disconnected user sessions.

    #.DESCRIPTION
    #   Checks for disconnected sessions and logs off the disconnected user sessions.

    #.NOTES
    #   File Name: Logoff-DisconnectedSession.ps1
    #   Author   : Bart Kuppens
    #   Version  : 1.1

    #.EXAMPLE
    #   PS > .\Logoff-DisconnectedSession.ps1

    function Ensure-LogFilePath([string]$LogFilePath)
    {
     if (!(Test-Path -Path $LogFilePath)) {New-Item $LogFilePath -ItemType directory >> $null}
    }

    function Write-Log([string]$message)
    {
       Out-File -InputObject $message -FilePath $LogFile -Append
    }

    function Get-Sessions
    {
       $queryResults = query session
       $starters = New-Object psobject -Property @{"SessionName" = 0; "UserName" = 0; "ID" = 0; "State" = 0; "Type" = 0; "Device" = 0;}
       foreach ($result in $queryResults)
       {
          try
          {
             if($result.trim().substring(0, $result.trim().indexof(" ")) -eq "SESSIONNAME")
             {
                $starters.UserName = $result.indexof("USERNAME");
                $starters.ID = $result.indexof("ID");
                $starters.State = $result.indexof("STATE");
                $starters.Type = $result.indexof("TYPE");
                $starters.Device = $result.indexof("DEVICE");
                continue;
             }

             New-Object psobject -Property @{
                "SessionName" = $result.trim().substring(0, $result.trim().indexof(" ")).trim(">");
                "Username" = $result.Substring($starters.Username, $result.IndexOf(" ", $starters.Username) - $starters.Username);
                "ID" = $result.Substring($result.IndexOf(" ", $starters.Username), $starters.ID - $result.IndexOf(" ", $starters.Username) + 2).trim();
                "State" = $result.Substring($starters.State, $result.IndexOf(" ", $starters.State)-$starters.State).trim();
                "Type" = $result.Substring($starters.Type, $starters.Device - $starters.Type).trim();
                "Device" = $result.Substring($starters.Device).trim()
             }
          } 
          catch 
          {
             $e = $_;
             Write-Log "ERROR: " + $e.PSMessageDetails
          }
       }
    }

    Ensure-LogFilePath($ENV:LOCALAPPDATA + "\DisconnectedSessions")
    #$LogFile = $ENV:LOCALAPPDATA + "\DisconnectedSessions\" + "sessions_" + $([DateTime]::Now.ToString('yyyyMMdd')) + ".log"
    $LogFile = "c:\Logs\DisconnectedSessions\" + "sessions_" + $([DateTime]::Now.ToString('yyyyMMdd')) + ".log"

    [string]$IncludeStates = '^(Disc)$'
    Write-Log -Message "Disconnected Sessions CleanUp"
    Write-Log -Message "============================="
    $DisconnectedSessions = Get-Sessions | ? {$_.State -match $IncludeStates -and $_.UserName -ne ""} | Select ID, UserName
    Write-Log -Message "Logged off sessions"
    Write-Log -Message "-------------------"
    foreach ($session in $DisconnectedSessions)
    {
       logoff $session.ID
       Write-Log -Message $session.Username
    }
    Write-Log -Message " "
    Write-Log -Message "Finished"  

Whenever a user session ends and the disconnect event is logged the taskscheduler will wait 2 minutes the nrun the script and reset / log-off all the disconnected users.

Hope this helps you.