Outlook Express and Outlook repeatedly prompt you for your password when you check messages on an Exchange Server-based computer

Applies to: Microsoft Office Outlook 2007Microsoft Office Outlook 2003Microsoft Outlook 2010

To use the steps in this article, you must use a Microsoft Exchange Server 2003 or Exchange Server 2007 account. Most home and personal accounts do not use Microsoft Exchange. For more information about Microsoft Exchange accounts and how to determine which version of Exchange your account connects to, see the links in the "References" section.


This article contains steps for you to follow to set up your Post Office Protocol 3 (POP3) or Internet Message Access Protocol 4 (IMAP4) account so that you can use a Microsoft Exchange Server 2003 or Exchange Server 2007 account. This article also provides links to other articles that may help you learn more about and troubleshoot problems with Microsoft Exchange Server accounts.

Symptoms of the problem

When you use Outlook or Outlook Express and you try to check for messages on an Exchange Server-based computer, you may be repeatedly prompted for your user name and password.

Steps to resolve the problem

When you use the default Exchange Server POP3 or IMAP4 authentication setting (Clear Text Authentication), set your POP3 or IMAP4 account name to include the following information:


For example, if your domain is "Name_of_domain," your account name is "Myaccount," and your Exchange Server alias is "Serveralias," your account name is as follows:
To find your account name in Outlook Express:

  1. On the Tools menu, click Accounts.
  2. Click the Mail tab, and then click your mail account.
  3. Click Properties, and then click the Servers tab.

More Information

On the Exchange Server-based computer, the following information is registered in the Application log:

Event ID: 13003
Source: MSExchange Pop3
Type: Error
Category: Authentication
Description: Logon attempt from to alias failed: HrLookupCredentials() call failed with error Logon failure: unknown user name or bad password.
The dialog box that appears when you try to retrieve messages displays the following message on the Errors tab, under Details:

There was a problem logging onto your mail server. Your Password was rejected. Account: 'alias on Server', Server: 'server', Protocol: POP3, Server Response: '-ERR Logon failure: unknown user name or bad password.', Port 110, Secure(SSL): No, Server Error: 0x800CCC90, Error Number: 0x800CCC92
If you look on the Exchange server, you may receive the following Event ID from IMAP4:

Event ID: 13005
Source: MSExchange IMAP4,
Type: Authentication
Description: logon attempt by Domain\User from IP Address of Exchange Server has failed: EcCreateothersess() call failed with: You do not have permission to log on.


The POP3 and IMAP4 authentication settings on the Exchange Server-based computer can affect the way that you fix this problem. For more information about how to fix this problem, click the following article numbers to view the articles in the Microsoft Knowledge Base:
191558 POP-3 Secure Password Authentication
202061 XIMS: POP3 Outlook Express error: 0x8000CCC18 and Exchange Server
For more information about problems that may occur when you try to save your password in Outlook and in Outlook Express, click the following article number to view the article in the Microsoft Knowledge Base:
290684 Save password setting not retained in Outlook or Outlook Express