Dynamics CRM Email Attachments and Activity Parties

I know my questions are easy and hundreds of you have the answers.

I am trying to migrate emails from one Dynamics CRM instance to another.  I have the emails successfully moved (Except attachments and related people).  I need to know how to map From, To, Sender, and Attachments.  Please help.  If there's an instruction guide that has this level of detail, please refer me.


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