A:AnswerYes. We use this feature on a daily basis.
I have not explored the machine's ability to scan directly to email, but I'm pretty certain this is possible (as I have had other older Brother models that had this feature.)
A:AnswerIf you search the brother web site you will find that they claim that an additional 500 sheet tray can be added. This is a direct quote from the site:
"Flexible paper handling. The MFC-L8850CDW features a 250-sheet capacity tray that is adjustable for letter or legal-size paper, plus a 50-sheet capacity multi-purpose tray. An optional 500-sheet capacity paper tray‡ is available for additional capacity."
Hope this helps