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POP3 and IMAP Clients Are Not Authenticated on Exchange Server 2000
Article ID: 272492 - View products that this article applies to.
This article was previously published under Q272492
When the Exchange Server 2000 registry key HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\LSA has the LmCompatibilitylevel value set to 5, POP3 and IMAP clients are not authenticated.
This issue occurs because the 5 value does not allow a check for clear text passwords, and authentication therefore does not work properly.
A supported fix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Apply it only to computers that are experiencing this specific problem.
To resolve this problem, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information about support costs, visit the following Microsoft Web site:
http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMSNOTE: In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.
The English version of this fix should have the following file attributes or later:
Date Time Size File name Platform --------------------------------------------------- 25-Sep-2000 21:07 247,056 Advapi32.dll x86 25-Sep-2000 21:08 48,400 Msv1_0.dll x86 25-Sep-2000 21:06 403,728 Advapi32.dll Alpha 25-Sep-2000 21:06 79,632 Msv1_0.dll Alpha
Article ID: 272492 - Last Review: March 1, 2007 - Revision: 2.4