How to add a Trigger for automatically changing the Agent Status:

• Start - List of all Applications - Windows Management Tools - Taskplaner
• Action - New Task
• Name: "Agent not available"
• Trigger - New...
• Start Task: On Workstation Lock
• Actions - New...
• Program / Script: c:\...\agent_status.bat
• Add Argument: API-ID API-PSEC AGENT-ID STATUS-ID
• Ok

Status-ID could be 1 for 'Available', 6 for 'Not Available' or any other Status-ID from your status list.