Outlook Web Access did not initialize.A forms registry file is not valid %1 Line number = %2 Position = %3. You cannot define a base experience when you choose to inherit from another forms registry. The base experience of the forms registry from which you chose to inherit is always used.The forms registry is a critical component of Outlook Web Access. If this error is not addressed, users might be unable to access the Outlook Web Access client. For more information about how to troubleshoot the forms registry, see the Help and Support Center.

This Error event indicates that a forms registry inherits from another forms registry and also defines a base experience. When a forms registry inherits from another one, it inherits the base experience of the forms registry from which it inherits and cannot define a base experience of its own. For example, if Registry A inherits from Registry B, it inherits the base experience from Registry B and cannot have its own base experience.

To resolve this error, do one or more of the following:

• If you want to use the inherited base experience, open the forms registry that is set to inherit and remove its base experience.

• If you want to keep the base experience, open the specified forms registry and remove the inheritance.

• If you have difficulty resolving the issue, contact Microsoft Customer Support. For information about how to contact support, Microsoft Help and Support.

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.