"... computer reported file reputation lookup issues"

Just about every day SEPM sends an email alert saying a few computers have "reported file reputation lookup issues". Its not all of the computers and its usually a differnt mix of several computers every time.

This means that a few computers had issues connecting to Symantec to download some Insight reputation files right?

So I have two questions:

Is there a specific URL I can browse to on client machines to confirm they have connectivity to Symantec's file repurtation database?

When do SEP clients connect to this database and can I set that to a fixed schedual (like can file reputation DB at 4:00am every day for updates)