Wednesday, July 14, 2010

Internal Email and FileIt Links are blocked by Outlook after Office Update

After this week's Office Update users have began to report problems opening links sent from TrialWorks. These links, sometimes believed to be attachments, are generated using FileIT and the "Internal Email" button. The actual links are blocked on computers running Outlook XP (2002), Outlook 2003, Outlook 2007, and Outlook 2010.

Users see the following:

Outlook blocked access to the following potentially unsafe attachments: filename.


"The attachments that are affected by this issue are fairly uncommon. They are typically created by custom solutions by using Extended MAPI or the Outlook object model to add functionality to a Microsoft Exchange mailbox or to a local set of Outlook folders."


Currently only fix is to remove the referenced update. You will need to:

  • Go to Control Panel, Add/Remove Programs OR Control Panel, Programs and Features
(Office 2003) Locate the office update "Outlook Security Update.... KB980373"
(Office 2007) Locate the office update "Outlook Security Update.... KB980376"
  • Remove It


This issue occurs because, by default, Outlook 2010 does not allow linked file attachments to be opened.

Also, a July 2010 security update made a change to: