How to timestamp past activity?

[Anonymous]

I've recently created a campaign flow action for our MQLs to timestamp them when their lead score passes the threshold. Moving forward, we'll be able to run reports against that creation date.

Is there any way to timestamp PAST activity? 

[Anonymous]

Unfortunately not, unless you do it for every single past day (i.e. if it changed on this date, change data value to said date).

[Anonymous]

Jason is right. Not feasible in Marketo.

However, if you're using SFDC in conjuction, you could run a Lead History report and that might yield some results. You'll need to do some Excel manipulation before you can update though, as some leads will have multiple records, etc.