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Event ID: 13004 Source: MSExchangePop3Interface
Source
Level
Description
Logon attempt from <ip address> has failed: AcceptSecurityContext() call failed with error Access denied.
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As per Microsoft: “This issue may occur when NTLM authentication is enabled for POP3 access". See ME836063 for a hotfix applicable to Microsoft Exchange Server 5.5.
Client using Outlook Express to poll POP3 mail from an Exchange 5.5 server. Under the account properties, 'servers' tab, uncheck 'Log on using secure password authentication'.
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