Microsoft KB Archive/826730

= You receive a &quot;Microsoft Outlook could not sign or encrypt this message&quot; error message when you send or read a signed e-mail message in Outlook 2003 =

Article ID: 826730

Article Last Modified on 1/6/2006

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APPLIES TO


 * Microsoft Office Outlook 2003
 * Microsoft Office Outlook 2003 with Business Contact Manager

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SYMPTOMS
When you try to send a new signed e-mail message or to encrypt a new e-mail message or to decrypt a received e-mail message in Microsoft Office Outlook 2003, you may receive the following error message:

Microsoft Outlook could not sign or encrypt this message because your certificate is not valid.



CAUSE
This problem occurs when your e-mail account has been migrated to a new Microsoft Exchange server. The Key Management Services (KMS) certificates that are issued to your e-mail account will not be migrated to the new e-mail account unless they are correctly prepared for migration.



WORKAROUND
To work around this problem, your system administrator must reissue certificates for each user who was migrated to the new Exchange server.



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



MORE INFORMATION
After your system administrator issues new KMS certificates to the user accounts on the original Exchange server, the administrator must run the GalSynchronization Management Agent (GalSync) before using the Migration Wizard to migrate the accounts from the original Exchange server to the new Exchange server. This will let the certificates that are assigned to each user account migrate correctly to the new Exchange server.

Additional query words: OL11 OL2003 digitally signed

Keywords: kberrmsg kbnofix kbprb KB826730

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