[otrs] Regarding Bcc Field in Otrs

Hello, I just went through table structure and got to know that Bcc fields ID are not stored in database. I was wondering why is this field skipped? I would like to know the reason since even search doesnt has Bcc field and in ticket view too Bcc id's are not displayed. I want to know the reason behind this thing. Regards, Sumeet Jain