Dynamics CRM Plugins

Hi, Thanks for your assist, help and support  on the following.....Our users are using CRM online with outlook 2013 CRM plugins and the question  I would like to get an answer,advice on how to do is as follows....When a user send an email to a contact in Dynamic CRM Where in CRM can another user see the email that was sent to that contact  when that user open that customer contact page.