Some of our Outlook 2007 users have sent .docx files only to have another Outlook 2007 user receive it as a .dat file. Manually changing the extension back to .docx makes it work again with Word 2007, but that is a pain and confuses users.
Any idea why Outlook 2007 would convert it to a .dat file? Can we force Outlook to leave the .docx extension intact.
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