Logoff remote user with PowerShell
$userName = '<account>'
$server = "<server>"
$sessionId = ((quser /server:$server | Where-Object { $_ -match $userName }) -split ' +')[2]
write-host $sessionId
logoff $sessionId /server:$server
# REF: https://4sysops.com/archives/how-to-force-a-user-logoff-remotely-with-powershell/