Article ID: 318589 - Last Review: July 28, 2006 - Revision: 1.3 OL2002: You Cannot Send Encrypted Mail to An LDAP RecipientThis article was previously published under Q318589 IMPORTANT: This article contains information about modifying the registry. Before you
modify the registry, make sure to back it up and make sure that you understand how to restore
the registry if a problem occurs. For information about how to back up, restore, and edit the
registry, click the following article number to view the article in the Microsoft Knowledge Base:
256986
(http://support.microsoft.com/kb/256986/EN-US/
)
Description of the Microsoft Windows Registry
On This PageSYMPTOMS
In Outlook, when you address an e-mail message to a Lightweight Directory Access Protocol (LDAP) recipient that includes an encryption certificate and you choose to encrypt the message, you receive the following error message when you try to send the message:
Encryption Problems Microsoft Outlook had problems encrypting this message because the following recipients had missing or invalid certificates, or conflicting or unsupported encryption capabilities: <recipient name> Continue will encrypt and send the message, but the listed recipients may not be able to read it. RESOLUTIONTo 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
(http://support.microsoft.com/kb/307841/EN-US/
)
OFFXP: How to Obtain the Latest Office XP Service Pack
The English version of this fix should have the following file attributes or later:Date Time Version Size File name ---------------------------------------------------------- 20-DEC-2001 18:43 10.0.3618.0 47,432 Bjablr32.dll 05-FEB-2002 15:14 10.0.3729.0 538,952 Emsmdb32.dll 21-FEB-2002 21:01 10.0.3819.0 850,248 Msmapi32.dll 29-APR-2002 11:43 10.0.4024.0 108,872 Emablt32.dll STATUSMicrosoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Microsoft Office XP Service Pack 2 (SP-2). MORE INFORMATION
If you try to send mail to LDAP recipients and you use high encryption (more than 40-bit), you must also make a change to the registry. See the following section for instructions.
How to Send Mail with High EncryptionWARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.Use the following procedure after you install the hotfix.
For information on , please see the following Knowledge Base article: For additional information about problems that you may experience when you use high encryption, click the article number below to view the article in the Microsoft Knowledge Base: 307472
(http://support.microsoft.com/kb/307472/EN-US/
)
OL2002: Recipients Cannot Read Messages When 168-Bit (3DES) Encryption Is Enabled
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