DOCUMENT:Q184463 06-AUG-2002 [exchange] TITLE :XFOR: Cannot Connect to Server with POP3 Client PRODUCT :Microsoft Exchange PROD/VER::5.0,5.5 OPER/SYS: KEYWORDS:exc5 exc55 ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Exchange 2000 Server - Microsoft Exchange Server, versions 5.0, 5.5 ------------------------------------------------------------------------------- SYMPTOMS ======== You may be unable to connect to a computer running Microsoft Exchange Server with a Post Office Protocol version 3 (POP3) or Internet Messaging Access Protocol 4 (IMAP) e-mail client. No error messages are displayed. CAUSE ===== This problem can occur when your Microsoft Exchange Server mailbox name is different from your Windows NT user name and you do not specify both names in the properties for the Microsoft Exchange Server information service. If you do not specify both names, the Microsoft Exchange Server computer may be unable to authenticate your user account and password. WORKAROUND ========== To resolve this problem, specify your Windows NT domain, Windows NT user name, and Microsoft Exchange Server mailbox name in the properties for the Microsoft Exchange Server information service. To do so, follow these steps: 1. On the Tools menu in your e-mail client, click Services. 2. Click Microsoft Exchange Server in the list of information services, and then click Properties. 3. In the Mailbox box, type "\\" (without the quotation marks) where is your Windows NT domain, is your Windows NT user name, and is your Microsoft Exchange Server mailbox name. For example, type: "Domain1\User1\Mailbox1" (without the quotation marks) 4. Click OK, and then click OK again. MORE INFORMATION ================ If you specify your mailbox name in the properties for the Microsoft Exchange Server information service, but do not specify your domain and user name, the computer running Microsoft Exchange Server assumes that your user name is the same as your mailbox name. If it is not, the server is unable to locate your user account. If you specify the domain and user name, but do not specify the mailbox name, the server assumes that your mailbox name is the same as your user name. If it is not, the server is unable to locate your mailbox. Additional query words: ====================================================================== Keywords : exc5 exc55 Technology : kbExchangeSearch kbExchange500 kbExchange550 kbZNotKeyword2 kbExchange2000Search kbExchange2000Serv Version : :5.0,5.5 Issue type : kbprb ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2002.