Article ID: 274359
Article Last Modified on 2/21/2007
APPLIES TO
- Microsoft Windows 2000 Server
- Microsoft Windows 2000 Advanced Server
- Microsoft Windows 2000 Professional Edition
This article was previously published under Q274359
SYMPTOMS
POP3/IMAP clients are not authenticated correctly if your Microsoft Exchange-based server (which is also a domain controller) is configured to use NTLM version 2 authentication and the LmCompatibilityLevel setting is set to 5.
CAUSE
When the LogonUser function is called with LOGON32_LOGON_NETWORK, the function does not work if the LmCompatibilityLevel setting is set to 5.
Setting the LmCompatibilityLevel setting to anything other than 5 works correctly.
RESOLUTION
To resolve this problem, obtain the latest service pack for Windows 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
260910 How to Obtain the Latest Windows 2000 Service Pack
The English version of this fix should have the following file attributes or later:
Date Time Version Size File name
-----------------------------------------------------------
01/25/2001 03:24 PM 5.0.2195.2842 130,320 Adsldpc.dll
01/25/2001 03:24 PM 5.0.2195.2835 348,944 Advapi32.dll
01/25/2001 03:23 PM 5.0.2195.2816 502,032 Instlsa5.dll
01/25/2001 03:24 PM 5.0.2195.2842 140,560 Kdcsvc.dll
01/17/2001 02:17 PM 5.0.2195.2842 198,928 Kerberos.dll
12/19/2000 10:13 PM 5.0.2195.2808 69,456 Ksecdd.sys
01/25/2001 03:24 PM 5.0.2195.2816 484,112 Lsasrv.dll
01/02/2001 09:45 AM 5.0.2195.2816 33,552 Lsass.exe
01/23/2001 06:06 PM 5.0.2195.2850 108,816 Msv1_0.dll
01/25/2001 03:24 PM 5.0.2195.2844 912,656 Ntdsa.dll
01/25/2001 03:24 PM 5.0.2195.2780 363,280 Samsrv.dll
01/25/2001 03:24 PM 5.0.2195.2797 128,272 Wldap32.dll
STATUS
Microsoft 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 Windows 2000 Service Pack 2.
MORE INFORMATION
For additional information about how to install Windows 2000 and Windows 2000 hotfixes at the same time, click the article number below to view the article in the Microsoft Knowledge Base:
249149 Installing Microsoft Windows 2000 and Windows 2000 Hotfixes
Keywords: kbhotfixserver kbqfe kbbug kbfix kbqfe KB274359
