Data was dropped due to too much outstanding data in rule “Microsoft.SystemCenter.Agent.MaintenanceMode” running for instance “site-scom.local” with id: in management group “Your Management Group.”

Resolve: If in a single management server environment, take the management server out of maintenance mode.

Never put a management server in maintenance mode:

I am new to SCOM and recently started using ‘maintenance modes’ based on the following article:

My logic while flawed was to put the server in maintenance mode after applying updates and reboot. I left it in maintenance mode to resolve a couple of start up errors but all monitoring ceased. Take the server out of maintenance mode…and all was well…humbling… easy fix.

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