Microsoft KB Archive/173692

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Event 1016 Generated When You Open Mailbox or Schedule of Another User

Article ID: 173692

Article Last Modified on 10/28/2006



APPLIES TO

  • Microsoft Exchange Server 5.0 Standard Edition
  • Microsoft Exchange Server 5.5 Standard Edition



This article was previously published under Q173692


SYMPTOMS

When you attempt to access another user's mailbox or schedule, Microsoft Exchange generates the following event in the Application Event log:

Event ID: 1016
Source: MSExchangeIS Private
Type: Success Audit
Category: Logons
NT User DOMAIN\username logged on to John Doe mailbox, and is not the primary Windows NT account on this mailbox.

This occurs even if you have permission to access the mailbox, and it occurs regardless of whether your attempt is successful or unsuccessful.

CAUSE

This behavior is by design.

Exchange records Event 1016 in the Event Log regardless of how you set the diagnostics logging level on the Information Store.

The decision to log this error was made with security in mind. It is important that any possible security breach be logged. If this type of logging were suppressed, an actual breach of security would not be logged.


Additional query words: plus client outlook calendar

Keywords: kbprb KB173692