Unblocking procedure

Unblocking attachments involves editing the registry. Please be careful to only make the recommended changes or you may end up maing your computer unbootable.

1. Make sure Outlook is closed.
2. Open the Registry Editor;
   • Start-> type; regedit
3. Locate the following key
   • Outlook 2007
     [HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Outlook\Security]
   • Outlook 2010
     [HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Outlook\Security]
   • Outlook 2013
     [HKEY_CURRENT_USER\Software\Microsoft\Office\15.0\Outlook\Security]
   • Outlook 2016, Outlook 2019 and Microsoft 365
     [HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\Security]
4. Go to Edit-> New-> String Value and name the value Level1Remove (case sensitive!)
5. Double-click on the newly created value and enter the extension including the “dot” that you want to open in Outlook. For instance .exe
   If you need to enter more than one extension you’ll have to type separate them by a semicolon like this; .exe;.bat;.url
6. Press OK on the input box and close the registry editor
7. When you open now Outlook, the attachments which hold those extensions aren’t blocked by Outlook anymore.