Email Attachments Coming In As .Bin Files

Problem:

Had a user who was sending attachments (in this case they were MS Word documents with a .doc extension) through Outlook 2010. Some (not all) external recipients who were on Outlook Office 365 were receiving the attachments as .BIN files:bin

Solution:

On the Exchange server, for Remote Domains, tell it never to use RTF:

exchange

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