As a 3CX Provider If you have a large business or just purchase licensing through us, we give you the ability to create new tenants or "Instances" if needed. This is useful for clients that are doing POCs or need to scale a new location that needs their own 3CX instance.
If you want to see all instances in one account, you must use the same email that you use to login to the 3CX customer account to register all new/future instances.