Exchange Search Indexer has temporarily disabled indexing of the Mailbox Database %1 (GUID = %2) due to an error (%3).

This Warning event indicates that the Microsoft Exchange Search service has temporarily disabled indexing of the specified mailbox database due to the error stated in the warning message description. Users who have mailboxes in the mailbox database will experience slow search. Exchange Search disables indexing temporarily when the Microsoft Search (MS Search) engine is unable to crawl the database because of any of the following reasons:

• The mailbox is dismounted or is offline

• The store is down

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

• Do nothing. Exchange Search will try to index the database when the store is back online or is mounted.

• Get additional help by posting the issue at Newsgroups: Exchange Server and Outlook.

• If the problem persists, contact Microsoft Product Support Services. For more information, 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.