you could use scheduled maintenance mode for this. Place the servers in maintenance mode right around the time of the reboots. Or at least the health service watchers for these.Bob Cornelissen - BICTT (My Blog about SCOM) - MVP 2012 and Microsoft Community Contributor 2011 Recipient

We have a number of servers we reboot at 2am in the morning. The physical boxes take around 4-5 minutes to come back online and thus produce an Alert as the Heartbeat alert can handle 3 missed heartbeats in 60 second intervals. The VM's typically are up in 3 minute so no alert. Can I setup an override that indicates from 2am - 2:30am don't alert on a heartbeat failure on these servers? I can't find where to set this up. I know I can setup in Admin/Device Mgt/Agent Mng/object/properties and override global server settings for heartbeat but then this would be all day long. I want to be notified during other hours of heartbeat failures but not during planned reboots. Note for Heartbeat interval override How to Override the Heartbeat Interval Use the following procedure to override the agent heartbeat interval settings for a specific agent. To override the heartbeat interval setting Log on to the Operations console with an account that is a member of the Administrators role for the Operations Manager 2007 management group.Click the Administration button.In the Administration pane, expand Administration, expand Device Management, and then click Agent Managed.In the results pane, right-click the object that you want to view the properties of, and then click Properties.In the Agent Properties dialog box, select Override global server settings.Change the Heartbeat interval. The maximum value allowed for the heartbeat interval is 86,400 seconds (1 day). The minimum value allowed is 5 seconds.Click OK.

you could use scheduled maintenance mode for this. Place the servers in maintenance mode right around the time of the reboots. Or at least the health service watchers for these.Bob Cornelissen - BICTT (My Blog about SCOM) - MVP 2012 and Microsoft Community Contributor 2011 Recipient