Event ID - 13003

Event Id13003
SourceMSExchangePOP3
DescriptionHr lookup credentials () call failed with error logon failure. Unknown user name or bad password
Event Information"According to Microsoft:
CAUSE :

This behavior may occur if the Exchange Server mailbox alias is different from the Microsoft Windows user account name.
RESOLUTION:
To resolve this issue, use one of the following methods, as appropriate to your situation:
Use the following format for the user account name on the client, where Domain is the name of the domain, UserName is the Windows user account name, and Mailbox is the Exchange Server mailbox alias:Domain\UserName\Mailbox
NOTE: The Domain\UserName\Mailbox format is used by and works with Microsoft Outlook Express clients. Results may vary with other clients.
-or-
Change the Exchange Server mailbox alias to use the same name as the Windows user account name. By doing so, users require only one account name.
-or-
Create a second Exchange Server mailbox alias that matches the Windows user account name. "
Reference LinksPOP3 and IMAP4 Clients Cannot Log On to Exchange Server, and Event ID 13003 Occurs

Outlook Express and Outlook repeatedly prompt you for your password

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