The Primary Admin must "Invite" each person/user to their Intuit account under "My Account", "Manage Users", once you do this, login is a piece of cake for each user, as long as they have an individual Intuit account/login. There was an email sent from Inuit/EasyAcct around October with the Easyacct Login Requirements.

Here is a link Manage Account Users .

I also am adding the link from the email for setting up the new EasyAcct EasyAcct Setup 

Hope this helps!