I have that too I think... I can read all my older mails, but anything after
installing the office beta I can see some of the content in the 3 line
preview, but when I open the message, I get a blank screen (empty message),
and if I forward the message to someone else, the original message is gone. I
suspect it is a setting somewhere, but have not found anything yet. btw, I
tested by sending an email that just contained text.