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Article ID: 303671 - Last Review: October 24, 2013 - Revision: 3.4

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If you click the Keep Personal Address in option in a PAB (Personal Address Book) file in Outlook 2000 Service Release 1 (SR-1) and you have the search order set to search in the PAB first, Outlook 2000 SR-1 cannot find the recipient digital certificate and the following error message may occur when you send a digitally encrypted message:
Microsoft Outlook had problems encrypting the message because the following recipients had missing or invalid certificates, or conflicting or unsupported encryption capabilities.


This problem can occur because the search process erroneously stopped searching after it querried the PAB, instead of continuing the search in the Contacts folder.


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 English-language version of this fix should have the following file attributes or later:
   Date      Time    Version              Size    File name    
06/14/2000  13:11                 41KB  Bjablr32.dll
06/14/2000  13:12                 61KB  Bjlog32.dll
01/08/2001  17:37                 96KB  Bjsrch32.dll
06/19/2000  14:49  5.5.2652.65             700KB  Cdo.dll
06/19/2000  14:12  5.5.2652.65             790KB  Cdo.dll_0004
11/16/2000  04:25  9.0.                    121KB  Contab32.dll_0002
06/14/2000  13:14                180KB  Emablt32.dll
08/31/2000  15:43  5.5.3142.0              151KB  Emsabp32.dll_0005
07/06/2001  21:48  5.5.3160.0              581KB  Emsmdb32.dll_0005
06/01/2001  21:15  5.5.3159                129KB  Emsui32.dll_0005
06/02/2000  06:45               85KB  Envelope.dll
07/13/2001  05:53  5.5.3161.0              529KB  Exsec32.dll_0005
04/05/2000  15:02              189KB  Mimedir.dll
05/21/2001  14:20  5.5.3157.0              774KB  Msmapi32.dll_0001
05/21/2001  14:16  5.5.3157.0              609KB  Msmapi32.dll_0002
07/07/2000  23:07  5.5.3138.0              589KB  Mspst32.dll_0004
07/07/2000  23:03  5.5.3138.0              517KB  Mspst32.dll_0005
01/31/2000  21:26              193KB  oladd.fae
05/23/2000  11:20                          148KB
05/30/2000  14:53                           27KB  Olsec9.chm
05/22/2000  19:35                          167KB  Olxchng9.chm
02/08/2001  13:17  5.5.3153.0              444KB  Omi9.dll_0001
02/08/2001  13:21  5.5.3153.0              536KB  Omint.dll_0001
06/06/2001  13:05                          126KB  Out2ksec.mst
06/01/2001  21:15  8.30.3157.0             765KB  Outex.dll
05/23/2000  19:19                          542KB  Outlhlp.aw_0001
07/13/2001  05:36            5,205KB  Outllib.dll
07/13/2001  05:37  1,637KB  Outllibr.dll
07/13/2001  05:48  9.0.5512.0              361KB  Pstprx32.dll_0002
06/21/2001  18:01               73KB  Rm.dll
06/02/2000  07:30               65KB  Sendto9.dll



To work around this problem, replace the Keep Personal Addresses in field with Contacts, and then reply to the problem message again.


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


  • Microsoft Outlook 2000 Standard Edition
kbnosurvey kbarchive kbautohotfix kbhotfixserver kbqfe kboffice2000sp3fix kberrmsg kbprb kbqfe KB303671
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