How can I add an existing Zoho CRM user to my company's CRM account?

You can add a user to your company's CRM account if the user's email address is not already used to create an account in Zoho CRM. The user can replace the email address in his account with another one. Doing so will release the email address (without closing the account) needed to join the company account.

To release the email address

1. Log in to http://accounts.zoho.com.
2. In the Home page, click Email Address.
3. In the Email Address page, add a new email ID.
   A confirmation email will be sent to the new email ID.

Upon confirmation, you need to go back to http://accounts.zoho.com and make the new ID as primary and delete the email ID that was being used earlier. Once the email ID is released, it can be used to join the company's CRM account.