SugarChimp

I am using the basic free trial right now for SugarCRM 7.2.1. Everything seems to be working fine so far except I noticed one thing. When I mark a subscriber in MailChimp as Unsubscribed, it is supposed to check the "email opt out" field in the Lead record in Sugar. However, I noticed it was not doing this in Sugar. Although, when I am in Leads list view it does make the email address a darker color and won't let me click on the email. Also, when I hover over the email with my mouse it says "opted out". I noticed when I went into Studio in Sugar, that the "email opt out" field looks almost like it was a custom field I created. I do not remember doing this, I thought it had come with Sugar, but I am assuming this feature only works with the opt out field that came with Sugar which I can no longer find. So I am wondering if there is any way I can get this feature to work with my current email opt out field. Thank you in advance. Rebecca