I just got a new machine and upgraded to office 2013- 365 and the autocorrect function in Outlook will only allow "plaint text" (the formatted text option is grayed out). The formatting is important on various messages. For example:
Conf would become CONFIDENTIAL (in bold and red at top of message).
My office machine has outlook 2010 and it works just fine, so I know that it must be that some setting has been hidden. I can get to the File/Options/Mail/ABC/Spelling and Autocorrect/Autocorrect Options menu, and put in the text, but it won't allow input of formatted text.