Whenever you want to run a Task against an Alert, its so easy to use the $ID$ variable:
Create the powershell script c:\scripts\UpdAlert.ps1 with at least the following lines:
GET-SCOMAlert –id “$ID” | SET-SCOMAlert –TicketID ‘100’ –ResolutionState 249
And create the following Task:
Stay on one of your Alerts and Run the tasks
Refresh (F5) before you check the Alert
You could extend the script with other parameters like Logging Computer and User etc.
Check the Powershell help with the command: Get-Help Setp-SCOMAlert – Detailed to see more parameters.
See you a MMS