Exchange Web Services (EWS) - How to identify if meeting participant is mail group or individual attendee

Hello,

I am using EWS (Exchange Web Services) to do various operations with outlook meeting item. One of the requirement is to fetch created meeting and identify if particular participant is mail group email address or individual attendee's email address.

I could get meeting item using FindItem / GetItem however, not sure about how exactly participant's type can be checked.

Can you please suggest if any such option available with EWS ?

Thanks,