|Message:||Outlook Web Access is not available for this mailbox. If the problem continues, contact technical support for your organization and tell them the following: The Client Access server %1, running Microsoft Exchange version %2, attempted to find a Client Access server to proxy Outlook Web Access traffic for mailbox %3. The service discovery failed in looking up the Client Access server in the target Active Directory site.Additional information: %4.|
This Warning event indicates that the computer that is running the Client Access (CAS) server role could not determine the Client Access server that should handle a Microsoft Office Outlook Web Access request. Specifically, it could not determine whether the request should be processed by the local Client Access server, or if it should be proxied or redirected to a Client Access server in a different Active Directory site. Therefore, the mailbox specified in the event description could not be accessed through Outlook Web Access. This event may be caused by one or more of the following:
For more information about Outlook Web Access proxying and redirection, see Understanding Proxying and Redirection.
To resolve this error, take one or more of these steps:
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.