SYMPTOMS
If you click Send / Receive, or if you are using a regular Send / Receive to send or receive mail, Outlook will prompt you for your user account name and password, even if the account password saved in the work of the past.
CAUSE
In previous versions of Outlook, the account is to check the specific order, one at a time. In Outlook 2002, all at the same time to check the account. Some e-mail server mailbox lock, mail download .As a result, any attempts to access the mailbox while it is locked produce a logon error. Looking to explain the error of incorrect user name and password is sent to the server, and prompts you the correct username and password combination.

There are two accounts do not normally have the same configuration, but sometimes you may want to create multiple accounts in order to create a "virtual identity" that allows you to send mail through an account in the same, but using a different e-mail name, return address or other settings.
WORKAROUND
To work around this problem, avoid duplication of messages to download, configure an e-mail account does not download mail from the server. To do this:

1. On the Tools menu, point to Send / Receive Settings, and then click Define Send / Receive Groups.
2. Click Send / Receive group, it is necessary to configure (Group "All Accounts" (without quotation marks) is the default form created), and then click Edit.
3. In the accounts, click one of the account duplication.
4. Click to clear the check box to receive e-mail item.
5. Repeat steps 5 and 6 to repeat all the other account.
6. Click OK, and then click Close.