Microsoft KB Archive/115544

= OL98: Outlook Can Only Verify Security Certificates One Level Deep =

Article ID: 115544

Article Last Modified on 9/22/2005

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APPLIES TO


 * Microsoft Outlook 98 Standard Edition

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This article was previously published under Q115544



SYMPTOMS
Case 1. An Organization has deployed Microsoft Outlook 98 in Internet Mail Only (IMO) mode, and has obtained authorization to issue certificates from a certificate vendor like Verisign. In this scenario, all certificates issued by Verisign directly will be trusted, but all certificates that are issued by the organization will not be trusted.

Case 2. An Organization deploys Microsoft Outlook 98 in Corporate/Workgroup (CW) mode using Microsoft Exchange Server, and has more than one certificate server internally. In this scenario, all certificates issued by a branch of the organization other than the one the user's certificate came from will not be trusted.

Case 3. An Organization deploys Microsoft Outlook 98 in Corporate/Workgroup (CW) mode with Microsoft Exchange Server, and exchanges signed mail with external vendors. In this scenario, certificates issues by the external vendors will not be trusted.



CAUSE
Outlook 98 will only validate certificates one level deep.



RESOLUTION
A supported fix that corrects this problem is now available from Microsoft, but has not been fully regression-tested and should be applied only to systems experiencing this specific problem. If you are not severely affected by this specific problem, Microsoft recommends that you wait for the next Microsoft Outlook version that contains this fix.

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 on support costs, please go to the following address on the World Wide Web:

http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS

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

File Name    Version ---  Exsec32.dll   5.5.2370.0



STATUS
Microsoft has confirmed this to be a problem in Outlook 98.

Keywords: kbbug kbfix kbqfe kbhotfixserver KB115544

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