I believe this might be similar to APPINSIGHT for SQL - Unknown status for Top Indexes .etc but it has nothing to do with the logon setting. Essentially, on a very regular basis the Top Indexes component monitor goes into an unknown state for a select few databases, and it's the only component monitor that behaves this way (at least with such regularity). I'm polling every 5 minutes, so getting the error exactly at 1 hour intervals for any given database is a bit baffling. I don't suppose anyone can shed light on exactly what query this monitor is executing and/or why this clockwork outage might be happening?
