A customer has reported an issue with web client that many sessions are open while no body is working, they wanted to kill all these sessions without restarting the server, few researches over the internet returned the following CMD commands that did the trick, just Right Click the cmd.exe and run as administrator, then paste the following commands:
Taskkill /F /IM Microsoft.Dynamics.GP.Web.Services.Runtime.Process.exe
Taskkill /F /IM conhost.exe
Viola! You saved an hour of manually killing these in your task manager or session manager.
Note: To make sure that the windows cleans all sessions at night, I saved these commands into Batch.bat file and scheduled this with windows scheduler to run every night 4 AM, so users can find a clear log next morning.