Hello Glenn,The 'Last Authenticated' option in Profile Merge Rules basically reads data from the authenticated profile of the user who last logged in on the device.It also will not write new trait data to the authenticated profile if the user is anonymous. Upon authentication, new trait data gets wr...

Hello Glenn,You are quite right. In your example, Audience Manager will not tie devices 2 & 3 to a user's profile (until the time when the user authenticates on these devices). We would need a common identifier to tie the user's devices together. This common identifier is the user's Customer ID whic...

Hi Mandeep,You can format the email pixel as follows: <img src="http://companyname.demdex.net/event?d_event=imp&d_source=email&d_campaign=test>When you create a trait, you would use the rule:d_campaign == "test"Hope this helps!Thanks,Leticia