Article ID: 324025 - View products that this article applies to.
This article was previously published under Q324025
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Post Office Protocol 3 (POP3) and Internet Message Access Protocol, Version 4rev1 (IMAP4) clients may not be able to log on to Exchange 2000 Server or Exchange 5.5 Server. Additionally, you may receive an event message that is similar to the following event message in the Application log of Event Viewer:
Event ID: 13003
Event Type: MSExchangePOP3
Event Category: Authentication
Hr lookup credentials () call failed with error logon failure. Unknown user name or bad password.
This behavior may occur if the Exchange Server mailbox alias is different from the Microsoft Windows user account name.
To resolve this issue, use one of the following methods, as appropriate to your situation:
For additional information about how to troubleshoot a similar issue, click the article numbers below to view the articles in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/236032/EN-US/ )OLEXP: Outlook Express and Outlook Repeatedly Prompt You for Your Password
(http://support.microsoft.com/kb/199274/EN-US/ )XCON: Event 13005 During POP3 Logon