Calendar Connector fails with MAPI error 80004005

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This article was previously published under Q199042

Symptoms

The Microsoft Exchange Calendar Connector may fail to start on an Exchange Server computer that has a local replica of the Free/Busy public folder.

The following event ID messages may be logged in the application event log.

Event Type:Error
Event Source: MSExchangeCalCon
Event Category:Connection
Event ID:5005
Date:12/11/2000
Time:1:10:14 PM
User:N/A
Computer:EXCHANGE-GV
Description: The Calendar Connector could not connect to the Public Information Store due to MAPI error 80004005 and is shutting down. Ensure that the information Store service is running and the calendar connector service is configured to use the Exchange Services Account and Password in Services Control Manager before restarting the Calendar Connector.

Event Type:Error
Event Source: MSExchangeCalCon
Event Category:Connection
Event ID:5006
Date:12/11/2000
Time:1:10:14 PM
User:N/A
Computer:EXCHANGE-GV
Description: The Calendar Connector is shutting down due to an unrecoverable error.

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Cause

These symptoms appear when the public information store is deleted or moved to another Exchange Server computer.

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Resolution

Although MAPI mail clients can be re-directed to a public information store (Pub.edb), the Exchange Calendar Connector explicitly requires access to the local Exchange Server computer's public information store to complete its initialization routines.

The Exchange Server administrator must change a configuration setting on the server to force the calendar connector to stay focused on the local public information store. This can be done by following these steps:

Start the Microsoft Exchange Server Administrator program.
Go to the current server object and expand the properties to reveal the Private Information Store and Public Information Store objects.

NOTE: If you do not see the Public Information Store object, it has not yet been added to the Exchange Server. Ensure that this is done before you continue.
Click to select the Private Information Store, click File menu, and then click Properties to open its properties.
Click the General tab, and look for the public folder server setting near the bottom of the dialog box.
Change the server name to now point to itself rather than to a remote server.

This causes all MAPI clients to access the local replica for F/B information rather than using another server. This also enables the Calendar Connector to successfully sign on to the public information store locally.