| Event Id | 1022 |
| Source | POP3SVC |
| Description | DS lookup for user <user name>, connecting from <host name>, failed with error <error code>. |
| Event Information | According to Microsoft: EXPLANATION: This event indicates that when a POP3 client made an attempt to access a mailbox on the Exchange Server, the attempt failed because lookup of Active Directory for that user failed. This behavior occurs because the value in the User Logon Name (Pre-Windows 2000) box does not match the value in the Mailbox Alias box. USER ACTION: 1. Verify that the Mailbox Alias value and the User Logon Name (Pre-Windows 2000) value match. 2. Enter the logon credentials in the format DomainName\LogonName\MailboxAlias when you are connecting through POP3. |
| Reference Links | Exchange (POP3SVC) Users Cannot Log On Using POP3 and the Error 0x80040920 Is Logged |
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