Store Group Send "Last Email" DateTime
I’m looking into Group Send, and it has interesting potential.
One of the UI elements when you are composing an email is you get a list of everyone you plan to send to, and it tells you the last time they were emailed.

I would like this data point available in reporting OOB - if we’re going to surface it in the UI it should be stored in the MDA.
I would also, in general, like to know what is considered in this calculation. Is it just emails from Group Send? JO as well? Email Assist?