Managing Project using Contact Manager

N

noob

i am not sure if i am doing this right i am trying to use accoutn history to
link my projects data to account manager. for each project i have contract
document, report document, invoice, ... link thoes documents through account
history

now if i have multi projects for single account how do i manage thoes document

do i need to create new account for each project.

second question, how can i have a business contact shared between 2 accounts

thanks you
 
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