I have noticed with some of my users that they are unable to forward or send attachments as a reply using
Outlook 2016 on
Update: I have also noticed this with some of our
Windows 10 users, same issue with the same solution.
I realized that it is because the original email is sent in a Plain Text format, and does not convert properly even though settings are configured to do so.
This seems to have been a recent issue with only some users on the same version of Outlook. Possibly related to office updates released recently.
Sounds like you've run into a bug that was caused by a recent update. I'd like to confirm that the Outlook team is aware of this issue and working on it. Thank you for bringing it to our attention, and apologies for any inconvenience this has caused you. As Matthew mentions, the only workaround is to change the message format to HTML.