Error %1 occurred while performing a site folder check for Public Folder Store “%2”.

This Error event indicates that an error occurred while checking the site folders. The site folders include the Offline Address Book and Schedule+ free/busy Information folders. By design, site folders are checked regularly for duplicates and inconsistencies. When the public store is started, all folders in the site are checked. Duplicates are deleted, and missing folders are replaced.

This error could be caused by having two administrative groups with the same legacyExchangeDN, which could cause two site folders with the same name to be created. If this event is logged repeatedly, try one or more of the following:

• Review the Application log for related events. For example, events that occur immediately before and after this event may provide more information about the root cause of this event.

• If this event seems to be causing mailflow interruptions or other problems in your Exchange environment, contact Microsoft Product Support. For information about contacting support, visit the Contact Us page of 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.