A contact or company's email address can only be used one time across a help desk account even if the account hosts multiple brands.

So for example, if the ABC company has two End-User Portals (phones.abc.com & computer.abc.com) that were both linked to the same Cayzu Help Desk account, then a user ted@testuser.com could only register to one of those brands.   Ted could log in to both portals (phones.abc.com & computer.abc.com) using the same credentials but if Ted tried to register to both End-User Portals, he would receive this message: User name already exists. Please enter a different user name.

Want more information on Cayzu Helpdesk, visit: https://www.cayzu.com