I have several co-workers who use Mac Mail.
When they reply to my email, the response does not include the previous message (even when that option is selected in Mac Mail).
This is only an issue when viewing the response in Outlook 2013.
When viewed in Office 365 web app, or my iPhone, replies contain the entire previous message "chain".
In Outlook 2013 the previous messages appear as .htm attachments.
From my quick research, this appears to be tied to the handling of in-line attachment compatibility issues between Apple mail software and Microsoft...
Any fix and/or workaround would be greatly appreciated!