I am trying to add my boss, who is a user in Zoho CRM, into Zoho Campaigns so that he can view the analytics for our emails.  I am getting this error message.

This email address has been already used in some other organization. So you cannot add/invite this user 

I have seen on threads here, here, and here that the error message results because the user I am trying to add is already in the system, under a different company. I have three questions:

1. Does that mean our Zoho Campaigns and Zoho CRM are not properly synced?
2. If 1 is yes, how do I solve this, and marry the two services together?
3. If I send an email to support@zoho.com to have the user removed from the other company he is associated with, will he still be able to use Zoho CRM as well, as part of our company? He needs to be able to access both services

I have tried chatting but nobody could help answer these questions. I called but got an answering machine. Please respond here, or email me at megan dot hurwitt at randhsupply.com