New install of ES 3.3, the populating search appears not to have run... How can I jump start this lookup?
This lookup gets populated, if you use the "Advanced Filter" on the Thread Activity Dashboard. Select one (or more) events in the Thread Activity Details Panel, and filter or highlight the events. This will add an entry in the ppf_thread_activity.csv lookup.
If you don't want to use this functionality, you could also highlight and unhighlight the event, which will still create an entry in the csv, and make the warning disappear - but no highlights will remain!
Thank you for the answer. I love when it's a simple fix!