Thanks for your answer.
Unfortunately this is not working for me. I imported the alert and activated it. It returned a set of machines, but this set did not include those machines I mentioned in the original post. It just returned those machines, where no syncing is done at all.
The machines I want to hit are those, where the sync is enabled and Orion is obviously trying to do that sync, but fails due to a bad SNMP setup on the target. When I read out the 'last sync' value of those machines they are all inside that 10 minutes range, although the sync was not returning any value.
So what I'm looking for is something like a "lastSuccessfulSync" instead of "lastSync" variable.
Thanks and best regards