Microsoft KB Archive/831601

= Users receive a &quot;your digital ID name cannot be found by the underlying security system&quot; error message in Exchange 2000 Server =

Article ID: 831601

Article Last Modified on 10/27/2006

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APPLIES TO


 * Microsoft Exchange 2000 Server Standard Edition
 * Microsoft Exchange 2000 Enterprise Server

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SYMPTOMS
When a user tries to open a digitally signed e-mail message, the user may receive the following error message:

Your digital ID name cannot be found by the underlying security system

Additionally, the e-mail message may be truncated.



CAUSE
This problem may occur when all the following conditions are true:
 * The e-mail message is larger than 64 kilobytes (KB).
 * The recipient's mailbox is located on a computer that is running Microsoft Exchange 2000 Server, and the computer does not have the Microsoft Exchange 2000 Server Post-Service Pack 3 Rollup software update installed.
 * The recipient has configured Microsoft Outlook to send clear text signed messages.



Cumulative Rollup Information
To resolve this problem, click the following link to obtain the September 2003 Microsoft Exchange 2000 Server Post-Service Pack 3 (SP3) Rollup:

http://www.microsoft.com/downloads/details.aspx?FamilyId=E7AAA113-1403-4262-8269-4B2AB9AE5476&displaylang=en

For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

824282 September 2003 Exchange 2000 Server Post-Service Pack 3 Rollup

Note Because of file dependencies, Microsoft Exchange Server 2000 Service Pack 3 is required for you to install this software update.



WORKAROUND
To work around this problem, follow these steps:
 * 1) In Microsoft Outlook, click Options on the Tools menu, and then click the Security tab.
 * 2) Click to clear the Send clear text signed messages when sending signed message check box, and then click OK.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.

