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If you are using certificates to digitally encrypt your e-mail messages in Outlook 2002, and if all the following conditions are true
You are working in offline mode.
You are sending the e-mail message to another Microsoft Exchange security-enabled recipient.
Outlook 2002 sends the e-mail message unencrypted, and you receive the following message:
Microsoft Outlook had problems encrypting this message because the following recipients had missing or invalid certificates, or conflicting or unsupported encryption capabilities: [recipient email address]> Continue will encrypt and send the message but the listed recipients may not be able to read it.
If you try to send the same encrypted e-mail message to the same recipient while you are working online, Outlook 2002 successfully encrypts and sends the e-mail message.
This problem occurs if all the following conditions are true:
You have a contact in your Microsoft Outlook mailbox for the recipient.
Outlook 2002 uses the contact information for the recipient in the Outlook mailbox instead of using the information for the recipient that is in the offline Address Book to find the recipient's certificate.
The contact information in the Outlook mailbox does not have updated certificate information for the recipient.
Service Pack Information
This problem is corrected in Office XP Service Pack 3.
To resolve this problem, obtain the latest service pack for Microsoft Office XP. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
307841 How to obtain the latest Office XP Service Pack
A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem.
If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, submit a request to Microsoft Customer Service and Support to obtain the hotfix.
Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:
Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.
The global version of this hotfix has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.