Unfortunately this is not supported out of the box. But you could leverage alerting together with Orion SDK to trigger extra polls. High level flow would be:
- Setup alert on "transaction down"
- Add alert action to execute PowerShell script
- In this script invoke PollNow verb using Orion SDK Information on Orion.SEUM.Transaction entity for given transaction.
Orion SDK has PowerShell snap-in but it also supports other languages. You can find samples on solarwinds/OrionSDK · GitHub. PollNow verb can be used to trigger immediate poll for given transaction, same as if you click on Poll Now button on transaction details page.