Hello! This is my problem: I have many voip (sip) accounts to configure on different providers. For more than one the username is "aaaa". When i try to add a second account in 3cx voip providers it tells me that the ID (user for authentication) has to be different and unique. I have no possibility to change this id server-side, it's linked to the registration and phone number given to me, and i need to add all my voip numbers to the pbx. I'm using the free version, testing it before purchasing the small business.. someone can help? PS: This the error message: "a line with this authentication id already exist."