|Source:||MSExchange Search Indexer|
|Message:||The search index files for Mailbox Database %1 (GUID = %2) are invalid. They will be deleted and recreated in %3 minutes or soon after the Microsoft Exchange Search Indexer service is restarted.|
This Warning event indicates that the search index files for a mailbox database are too old and will be deleted. The event description will state the mailbox database GUID and will state how many minutes remain before the search index files are deleted. The index files for a mailbox database will be deleted when the following is true:
When the warning occurs, online mode searches for mailboxes on the affected mailbox database may take longer to return results until the index files are recreated. The event could be caused because of the following:
To resolve this warning, do nothing–wait until the index is recreated. After %3 minutes (the length of time stated in the event description), be aware that Exchange Search will be busy crawling the mailbox database and CPU usage should be high.
In Exchange Management Shell, run the command test-exchangesearch to verify that Exchange Search is enabled and is searching emails for a user mailbox in the mailbox database. For more information about how to run the command, see Test-ExchangeSearch.
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.