Hi,
Did you get any error message when you try to open attachments?
What's the file type of the attachments? Can you open and preview a Word or Excel attachment in Outlook? By default, Microsoft Outlook 2013 blocks potentially unsafe attachments (including .bat, .exe, .vbs, and .js files) that can contain
viruses.
In addition, please try to clean out the Temporary Outlook Files folder to check if it helps. See:
http://www.howto-outlook.com/faq/securetemp.htm
Please let me know the result.
Regards,
Steve Fan
TechNet Community Support
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Marked as answer by
Steve FanMicrosoft contingent staff, Moderator
Tuesday, May 20, 2014 9:13 AM