Thank you for the in-depth explanation @Jennifer_Dungan, I follow this, which sorts of raises a problem around understanding new vs repeat visitors at a server level, any suggestion on if this is possible to do as I'm trying to understand new vs repeat visitors on each server rather than at a global...

Hi @Jennifer_Dungan , @MandyGeorge , @bjoern__koth  Thank you for sharing your understanding of how this works, now this all makes sense, so visitor number is stitched to the ECID? Also how would you approach tracking new vs repeat visitors for each server, would that be possible? Many thanks,  

If I have a few servers sending data to one Global report suite, would the visit number reset dependent on the server they are on? for eg, I visit xyz.com as a first time visitor, this sends data to my global report suite, call it allSites. I then visit a subdomain abc.com as a first time visitor, w...