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What determines whether or not you get the Open/Save dialog when opening an attachment?

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The main setting that controls this is actually a part of Windows:

1. Open Windows Explorer
2. Tools | Folder Options
3. Select the File Types tab
4. Select the extension type (such as TXT) and click Advanced
5. If "Confirm open after download" is checked, you will get the open/save dialog. If it's not checked, the file will just open with the registered handler

Geeks: This changes the third octet in the EditFlags registry key in HKEY_CLASSES_ROOT\txtfile.

When Office is installed, it will configure EditFlags so that office documents do not get the open/save dialog, they just open automatically.

Note: If you're using Outlook 2000/98 with the security patch from 1999, you may get a dialog that only lets you save the file, not open it. This happens for the Level1 type files such as EXE, BAT, etc that are potentially dangerous. This was our first stab at attachment security, and it didn't work so well - I myself received several virus emails from people who received an email with an EXE attached, double clicked the EXE, saved it to their desktop and then ran it. After all, no one wants to be charged for a necklace they didn't buy.

Comments

  • Anonymous
    February 26, 2004
    The comment has been removed
  • Anonymous
    February 26, 2004
    Are you sure you're looking in the right place? EditFlags is under HKCRMSPaper.Document in my registry, not under HKCR.tif.

    You can find out what the actual name of the key (i.e. mspaper.document above) is by looking at the default value on HKCR.tif. For example, if you look at HKCR.txt, the (default) is txtfile, so you go to HKCRtxtfile to find EditFlags.
  • Anonymous
    February 27, 2004
    Got it! Just what I needed. Could I ask one more question though? The situation I am trying to resolve is on a Terminal Server. I need to modify this value for all users who log on. If I modify the registry value for my account, it doesn't carry over to another user. Is there a place I can update it for everyone or should I look into group policy for a vehicle to accomplish this?

    Thank you very much for taking time to answer these questions!
  • Anonymous
    February 27, 2004
    See http://support.microsoft.com/default.aspx?scid=kb;en-us;257592:

    In Windows 2000 and Windows Server 2003, information stored in the HKEY_LOCAL_MACHINESOFTWAREClasses registry key still contains global file type associations that are global to all users of the computer.
  • Anonymous
    March 03, 2004
    Thanks KC! Working well now.