Hidden Outlook Folder

When a user opens an attachment from within Outlook, the file is saved to a hidden location on the workstation they are using. Sometimes, an end-user would edit this copy of the document, save it, and then when they go to re-open it they can’t find it.

The hidden folder location is stored in the Registry under the “OutlookSecureTempFolder” key. The folder name is randomly generated. Search results do not bring up the location. Below is a quick-list of the registry entry you want to look at to give you the full folder name:

Outlook 97:


Outlook 98:


Outlook 2000:


Outlook 2002/XP:


Outlook 2003:


Outlook 2007:


Outlook 2010:


Microsoft KB:

View Message Headers in Office 2010 Ribbon

Outlook 2010 - Custom Ribbon1 – Select: File > Options

2 – Select: “Customize Ribbon” in left navigation

3 – Select “Main Tabs” section (or make a new tab)

4 – Add a new Group. Rename the group to your liking (“Message Headers”, perhaps?)

5 – From the “Choose commands from:” menu on the left, select “All commands”.

6 – Scroll down to locate “Message Options” and add that to your new Group.

7 – OK the changes, and exit.

The long way to get to the same area in 2010 is to:

1 – Double click to open the message you want to see headers for.

2 – Select: File  > Info >Properties