winmail.dat from Office365 and Windows 8.1 Users

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    jtaugher
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    #164739

    Issue: Client sends email with attached Word, excel, or pdf attachment, some recipients receive it fine, some receive the attachment as a winmail.dat file and can’t open it.

    Operating System: Windows 8.1
    Office Version: 2013
    Email: Office 365 hosted exchange

    Details:
    Happens on all PC’s at client site running 8.1
    Does not happen on one client pc Running Windows 7 and Office 2010

    Set up a Windows 8.1 machine with Office 2013 at our office, tested sending attachments to known email addresses who receive the attachments as winmail.dat files, all received the test email attachments fine. I tested both my email account and the clients email account, same results.

    Some google searches suggest adding the attachment 3 different ways, drag and drop, attach with paperclip icon, and from within the office application, file, share, email, send as attachment .

    Microsoft article https://support.microsoft.com/kb/278061/en-us suggests 4 different resolutions, we have tried them all with no resolution.

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