Process %1: Cross-forest proxy request to %2 could not be initiated due to invalid credentials. Error is: %3

Details
Product: Exchange
Event ID: 4012
Source: MSExchange Availability
Version: 8.0
Symbolic Name: InvalidCredentialsForCrossForestProxying
Message: Process %1: Cross-forest proxy request to %2 could not be initiated due to invalid credentials. Error is: %3
   
Explanation

This event indicates that a proxy Web request to a remote Active Directory® directory service forest cannot be issued because of invalid credentials. When the Microsoft® Exchange Availability service cannot directly connect to a mailbox that resides in a remote Active Directory forest, it sends a proxy Web request to another instance of the Exchange Availability service that is running in the remote Active Directory forest. The Exchange Availability service that is running in the remote Active Directory forest retrieves the requested information locally and passes the information back to the Exchange Availability service that requested the information. This event is logged on the Exchange server that sends a Web request to the Availability service that is running in the remote Active Directory forest.

   
User Action

To resolve this error, contact Microsoft Product Support Services. For more information, visit the Microsoft Help and Support Web site.

If you are not already doing so, consider running the tools that Microsoft Exchange offers to help administrators analyze and troubleshoot their Exchange environment. These tools can help you make sure that your configuration is in line with Microsoft best practices. They can also help you identify and resolve performance issues, improve mail flow, and better manage disaster recovery scenarios. Go to the Toolbox node of the Exchange Management Console to run these tools now. For more information about these tools, see Toolbox in the Exchange Server 2007 Help.

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