Add a hidden plain text field - I called mine 'Reviewers'
Set the default value to this formula
eval(eval(Person, 'concat(pc:AccountId, "; ")'), "..")You may have to manually select the 'Person' part (see below).
Be sure to select the person folder and click OK.
In the field properties, make sure the 'Refresh value when formula is recalculated' box is checked.
The formula above will select each person from the group and separate them by semi-colons (see below).
use this Test box field(Reviewers String) in the workflow (To address).
Please use the original post:http://somethingcode-ish.blogspot.com/2012/08/use-persongroup-picker-in-infopath-form.html