|Message:||Microsoft Exchange Client Access server “%1” attempted to proxy Outlook Web Access traffic to Client Access server “%2”. This failed for user “%3” because this user is a member of too many groups. Outlook Web Access limits the group membership when proxying to “%4”.|
This Error event indicates that Outlook Web Access could not proxy a request from a computer that is running the Client Access server role to a Client Access server that is located in a different Active Directory directory service site. This occurred because the Outlook Web Access user is a member of too many Active Directory groups.
To resolve this error, do one or more of the following:
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.