Adding second email help

I currently have an email account through homestead. I am using the homestead open-Xchange server directly . I hired an employee and want him to have email. I went in and upgraded my account to add one additional email. However, when I try to open the xchange server and go to configuration and try to "add email" I am getting an error message. I'm not sure I'm entering the proper information in the server setting snd outgoing server settings. When I try to just copy the same information that is listed as it pertains to my email I get error message. Can someone please help me set this up? I tried to get help via the chat service but he couldn't help me.