Create a maintenance windows

[Mp1999]

Hello everyone, I need to create a 2-hour maintenance window that generates an incident or alert when an agent is shut down. I am testing this on my production instance and I am unable to associate the existing agent with the newly created maintenance window. Can someone provide a step-by-step guide on how to do this? The activity is as follows:

We have some machines that shut down in a controlled way every day at a given time, we need that the monitoring does not raise incidents for those events during that defined time. These events raise the guard without duty.

[Mp1999]

should not create alerts in those hours*