When a PDF is opened and I select send as an attachment, Outlook 2016 opens with the file attached. I'm able to enter the body of the e-mail as normal. I can send the e-mail. The recipient does not see the text that was typed. It also does not show any text that was typed in the sent e-mail looking at sent items. This only occurs when sending a file through Adobe Acrobat DC. When I attach the file without going through Adobe, everything functions normally.