|Component:||Microsoft Exchange Proxy|
|Message:||Microsoft Exchange Server has detected that Basic Authentication is being attempted between this server and server ‘%1’. This authentication mechanism is not secure and it is not supported between front-ends and back-ends. If this condition persists, please verify that server ‘%1’ is properly configured to use Integrated Windows Authentication for each virtual directory used by Exchange. After applying any changes it may be necessary to restart Internet Information Services on both the front-end and back-end servers.|
This event may appear when both of the following conditions are true:
The text of this message implies that both the front-end server and the back-end server must be configured to use Integrated Windows authentication. This is incorrect. Only the back-end Exchange 2003 server must be configured to use Integrated Windows authentication.
The description of the event should read as follows:
For details, see the following articles in the Microsoft Knowledge Base:
Verify that the back-end server listed in the event description is configured to use Integrated Windows authentication, and that all front-end servers are configured to use Basic Authentication. If any authentication method changes are made to the front-end or back-end servers, restart the IIS Admin service on the front-end and back-end servers.