All Organization Account employees can invite employees of the same domain as the Organization Account domain defined in My Account settings. If your company (organization) has been acquired by another or your company domain has changed due to a rebranding, the organization domain can be updated to start adding employees with the new domain. Only Super Admins of the Organization Account can update the domain. For more information, refer to Updating Domain of the Organization Account.
To add employees to the Organization Account
Select the Contact Type as Employee.
Enter User Email ID.
Make sure that the domain of the entered Email ID is the same as the Organization Account domain defined in My Account settings.