How to create an alert if an ESXi node is put into maintenance mode?
I found it. There is a field named In Maintenance Mode in the Virtual Host category
This alert trigger will create an alert when an ESX host is unmanaged:
I think unmanaged is a different condition to maintenance mode.
What's the difference between unmanaged and maintenance mode?
Great! Your trigger condition should be:
Unmanaged means vCentre has no verified connection to the ESI node. Maintenance mod means the admin actively put it into that mode and vCenter has full connectivity to it and a verified connection