Great I have found the alert that was triggered.
The only thing is that I didn't find it in my alert list. I will make a case for that unless you got more suggestions? You are really helping me
I have found the following in the description of the alert: "This alert will write to the SolarWinds event log when a node goes down and when a node comes back up again". Can it be that there is a module or something that goes trough the event log ans then sends out an sms? I am just trying to figure out why this isn't on the triggered alert list.