this should be done via custom alert in our alerting manager (you may use AND or OR operators between your conditions so in your case you may specify "scope A utilization > 90% and Scope B utilization > 90%" then trigger an alert. you may find this video useful if you are not familiar with our alerting manager: Video Tutorial: Orion Advanced Alerts - Videos | SolarWinds
We are also interested in getting alerts on MS split scopes. I know you said this can be done via alert manager, but our attempts we're not getting anywhere so far. Could you provide an example of how to setup this specific alert? Thanks.