KB46361: Outlook Web App shows "Access to attachments has been blocked. Blocked attachments: <FileName>" when opening a .mht

Outlook Web Access has blocked access to attachments. Blocked attachments: <FileName.mht>.

 
It doesn't occur when using Microsoft Outlook or opening the referred mht file through Internet Explorer.
 
CAUSE:
According to Microsoft, there is a default block set on the Outlook Web App (OWA) mailbox for .mht files.
 
ACTION:
Refer to the following Microsoft article: http://support.microsoft.com/kb/2852113/en-us
 
Third Party Software Installation WARNING
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