Disable Attachment Blocking (Outlook)

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Outlook by default blocks certain attachments (file-types) from being viewed for security reasons. Once blocked the file cannot be 'un-quarantined' and it can be more useful to disable the blocking at the client-level and establish filtering at another level.

To disable blocking on a per-extension basis:

Locate the following registry key, where <version> is your version of Outlook:

    [HKEY_CURRENT_USER\Software\Microsoft\Office\<version>\Outlook\Security]

Create a new string key called "Level1Remove" and add the extnsion(s) you wish to allow; seperating them with commas. Outlook will need to be restarted for the changes made to take effect.


See Also

Attachments blocked by Outlook

Registry

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