I am putting a Google Analytics 360 Data Extension as an entry source for a journey on SFMC. It works fine, but when I try to filter by email address it doesn't work. Does anyone know about the mapping with email addresses when using GA360. Has anyone else had this problem? Thanks.
Maybe this will be helpful: Since GA360 only passes the IDs of the subscribers, my best guess is that it matches the emails addresses with the All Subscribers list or the root Data Extension in your contact model?
I would check the contact model, and if needed, create an automation that queries either All Subscribers list or the root DE and replicates all IDs and email addresses to another Data Extension, which you could then link in Data Designer to your GA360 DE.