Hello Everyone!
We have an issue with pop/imap clients trying to authenticate.
Users log on with credentials from Account Forest, security audit shows a succesful log on and impersonation from process Microsoft.Exchange.Pop3.exe, but fails to login to mailbox.
The following warning appears in the event log:
Log Name: Application
Source: MSExchangePOP3
Date: 22/01/2014 11:41:29
Event ID: 2005
Task Category: (1)
Level: Warning
Keywords: Classic
User: N/A
Computer: exchangeCAS
Description:
User user1@account.forest wasn't found in Active Directory.
Protocol logs show the same warning.
Seems that Microsoft.Exchange.Pop3.exe process is unable to determine the linked mailbox of the provided credentials.