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Microsoft KB Archive/249760

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Knowledge Base

Article ID: 249760

Article Last Modified on 10/6/2005


  • Microsoft Outlook 2000 Standard Edition

This article was previously published under Q249760


When you attempt to open certain file types, a security warning that prompts you to save the file to your hard disk automatically issues. These file types cannot be altered in Outlook, so you are unable to add a new file type or remove one that already exists.


To resolve this problem, obtain Microsoft Office 2000 Service Release 1/1a (SR-1/SR-1a).

To obtain SR-1/SR-1a, click the article number below to view the article in the Microsoft Knowledge Base:

245025 OFF2000: How to Obtain and Install Microsoft Office 2000 Service Release 1/1a (SR-1/SR-1a)

A hotfix is now available that addresses this issue for non-secure builds of Outlook 2000.

A supported fix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Apply it only to computers that are experiencing this specific problem. This fix may receive additional testing. Therefore, if you are not severely affected by this problem, Microsoft recommends that you wait for the next that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information about support costs, visit the following Microsoft Web site:

NOTE: In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The typical support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

The English version of this fix should have the following file attributes or later:

Filename           Version
Emsmdb32.dll_0005  5.5.3139.0


Omi9.dll_0001    5.5.3134.0

Omint.dll_001    5.5.3134.0

Outex.dll          8.30.3140.0



After you apply this hotfix, two registry string values can be used to store the list of file extensions. These two registry string values control the warning dialog box for attachments:




Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was corrected in Microsoft Office 2000 SR-1/SR-1a.


The following is the default list of file types that issue a security warning upon opening:

   .bas      .bat      .chm
   .cmd      .com      .cpl
   .crt      .exe      .hlp
   .inf      .ins      .isp
   .lnk      .mst      .pcd
   .pif      .reg      .scr
   .url      .vbs      .zip

For additional information about how to customize which file extensions trigger the more secure warning, click the article number below to view the article in the Microsoft Knowledge Base:

259228 OL2000: Attachment Security Features Included in Service Release 1/1a

Additional query words: OL2K

Keywords: kbbug kbfix kbqfe kbhotfixserver KB249760