Entourage 2008 for Mac: “Logon failure: Unknown user name or bad password” when sending or receiving email in Entourage

SUPPORT SOLUTION:
When trying to send or receive email in Entourage for Mac 2008 you may receive the following error message: The server for account <Name of the Account> returned the error “Logon failure: Unknown user name or bad password. Your username/password or security settings may be incorrect. Would you like to try re-entering your password?”.To resolve the issue, following these steps: Test recieving before sending. If this does not work, please try the following troubleshoting steps. .Step 1: Verify that you can connect on the web
2, ‘resolution’);
First, test to see whether you can sign in by using the web-based application. For example, if you have a Gmail account, visit gmail.com, and then sign in.  If you can sign in, go to the next step. If you cannot sign in, contact your email client provider to obtain the correct user name and password.  .Step 2: Re-enter your user name and password
2, ‘resolution’);
Open Entourage. On the Tools menu, click Accounts. Open your email account. Enter the correct email address and the password. Verify that the listed “Incoming server” and “Outgoing server” are correct. Click the red button in the upper-left corner of the window to close the window.If the account settings are correct, proceed to the next step. .Step 3: Create a new user account
2, ‘resolution’);
Sometimes, a user’s specific information may be corrupted which can cause problems with applications starting, installing, or using. To determine if this is the case, you can log on as a new user or create a new user account, and then test an application. Important: If Entourage works in new user account, contact Apple to have the keychain reset for your old user profile. If new user account does not work then contact Apple or your Internet Service Provider (ISP) to have the account set up and tested in Apple Mail.For steps and instructions on how to create a new user account, click the following article number to view the article in the Microsoft Knowledge Base: 2439218
(http://support.microsoft.com/kb/2439218)
Testing your user account to troubleshoot Office for Mac applications .

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