Cisco AnyConnect can require that no other users be logged in. This script logs off these other users before launching it.

logoff-and-start-vpn.ps1

# Cisco AnyConnect can require that no other users be logged in.
# This script logs off these other users before launching it.

# Function to log off all users except the current one
function LogOffOtherUsers {
    Write-Output "LogOffOtherUsers:"
    $currentUser = (whoami).Split('\')[1]  # Extract the username from "hostname\user"
    Write-Output "Current user: $currentUser"
    $sessions = quser | ForEach-Object -Process { $_ -replace '\s{2,}',',' } | ConvertFrom-Csv
    $sessions | ForEach-Object {
        $session = $_
        $user = ($session.username) -replace '^[> ]',''
        if ($user -ne $currentUser) {
            Write-Output "Logging off $user"
            sudo logoff $session.sessionname
        }
    }
    # }
}

# Function to start Cisco AnyConnect GUI
function StartCiscoAnyConnectGUI {
    $anyConnectPath = "C:\Program Files (x86)\Cisco\Cisco AnyConnect Secure Mobility Client\vpnui.exe"
    
    if (Test-Path $anyConnectPath) {
        Start-Process -FilePath $anyConnectPath
    } else {
        Write-Output "Cisco AnyConnect client not found at $anyConnectPath"
    }
}

# Main script execution
LogOffOtherUsers

# Start Cisco AnyConnect GUI
StartCiscoAnyConnectGUI

On Windows 11 24H2 need to enable Sudo as explained here