• This Error event indicates that a MAPI call failed. This message indicates that the Microsoft Exchange System Attendant process has been unable to log on to the Mailbox database or Public Folder database. This error may be logged when the following conditions occur.
  
  
• Mounting a mailbox database or public folder databasewhen the System Attendant is trying to generate an Offline Address Book.
  
  
• Databases are down and the System Attendant is trying to perform routine management tasks.
  
  
• Attempting to perform a Move Request operation.
  
  Note   This event may be logged at the rate of one every minute on a clustered Exchange Server.
  
  

This event can have several causes. The cause of the error depends on the ID number that is specified in the event description. The following event IDs may be included in the events: 8004011d-0519-0000000, 80040111-0286-00000000, 8004011d-0289-00000000.

Some of the possible causes of this error are as follows:

• The Microsoft Exchange Information Store service is not running.
  
  
• The Microsoft Exchange Information Store service is running, but one or more databases are not mounted.
  
  
• The Read System Access Control List (SACL) of the Exchange Enterprise Group is lost.
  
  
• The MDBDATA folder has incorrect permissions.
  
  
• The System Attendant service is running with a different user account than "Local System."
  
  
• The System Mailbox object that is created for this mailbox database exists in the Microsoft Exchange System Objects container
  
  

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

• Verify that the Microsoft Exchange Information Store service is running.
  
  
• Make sure that the default mailbox database is mounted.
  
  
• Run setup /preparedomain.
  
  
• Verify the permissions on the MDBDATA folder.
  
  
• Change the properties of the System Attendant service so that it runs in the context of the Local System Account.
  
  
• Resolve your issue by using self-support options, assisted support options, and other resources. You can access these resources from the Exchange Server Solutions Center. From this page, click Self-Support Options in the navigation pane to use self-help options. Self-help options include searching the Microsoft Knowledge Base, posting a question at the Exchange Server forums, and others. Alternatively, in the navigation pane, you can click Assisted Support Options to contact a Microsoft support professional. Because your organization may have a specific procedure for directly contacting Microsoft Technical Support, be sure to review your organization's guidelines first.
  
  

If you are not already doing so, consider running the Exchange tools created to help you analyze and troubleshoot your Exchange environment. These tools can help make sure that your configuration aligns with Microsoft best practices. They can also help you identify and resolve performance issues, improve mail flow, and better manage disaster recovery scenarios. To run these tools, go to the Toolbox node of the Exchange Management Console. To learn more about these tools, see Managing Tools in the Toolbox.