Hi Hillary,
I got this KIND of working, but now with strange results. Here is the formula again, and the results.
People Picker Selection - "Darcy Wilson; Kevin Lambert; Peter Scott"
Formula - "eval(eval(Person, 'concat(../../my:group/pc:Person/pc:AccountId, ";")'), "..")"
Result - "i:0#.f|membership|[email protected];i:0#.f|membership|[email protected];i:0#.f|membership|[email protected];"
Now I know the stupid i:0#|membership stuff is the result of SharePoint 365. Though I have no idea how I can clean that up to have JUST the email address. But the bigger question is why I don't get three different results?