OWA Logons by Server and Logons by Mailbox report both show 0 unsuccessful logons (4241122)

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Titel

OWA Logons by Server and Logons by Mailbox report both show 0 unsuccessful logons
Beschreibung

OWA Logon by Server and Logons by Mailbox report both show 0 unsuccessful logons
Ursache

This Can be Caused if ISA Server, or ForeFront Threat Management Gateway are installed between the external users and Exchange Client Access Servers.

As Unsuccessful logons fail at the ISA/Forefront server and are not proxied to the Exchange Client Access Server, there is no data in the IIS logs on the Exchange Server for MessageStats to gather regarding failed logon attempts.
Lösung

There is currently no workaround for this issue.
Weitere Informationen

Unsuccessful logon attempts are only logged and reported on for Existing mailboxes. If an invalid username is used to logon to OWA MessageStats will not report on this, as it can not be associated with a known mailbox.

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