Article ID: 840182 - View products that this article applies to.
After you install and configure a Microsoft Exchange 2000 front-end server or a Microsoft Exchange Server 2003 front-end server, Exchange 2000 users and Exchange Server 2003 users who connect to the front-end server cannot access the Exchange public folders by using Microsoft Outlook Web Access (OWA). Users who try to do this may receive the following error message:
When you try to use Exchange System Manager to access the public folders on the Exchange 2000 front-end server or on the Exchange Server 2003 front-end server, the public folders cannot be accessed. You may receive the following error message:
HTTP 1.1/ 503 Service is no longer available
The HTTP service used by Public Folders is not available, possible causes are that Public stores are not mounted and the Information Store service is not running. ID no: c1030af3 Exchange System Manager
This problem typically occurs when the public folder on the Exchange 2000 front-end server or on the Exchange Server 2003 front-end server has been associated with the following:
Note With ExIFS, you can view and use the Exchange Server information store as a file system. In Exchange 2000, the M drive is a convenient handle for ExIFS. However, ExIFS can use a drive other than the M drive.
To resolve this issue, use the ADSI Edit tool to view the contents of the msExchOwningPFTreeBL object in Active Directory on the Exchange 2000 back-end server or on the Exchange Server 2003 back-end server, and then use ADSI Edit to verify that the msExchOwningPFTreeBL property value is correct. Also, verify that the msExchOwningPFTreeBL property value is the same for each administrative group.
Note ADSI Edit is available in the Support folder on the Windows 2000 CD-ROM.
To verify the msExchOwningPFTreeBL property value, follow these steps:
If the msExchOwningPFTreeBL property value is valid, there may be an incorrect physical path for the public folders in Microsoft Internet Information Services (IIS) on the Exchange front-end server. To verify the physical path for the public folders in IIS, follow these steps:
For additional information about troubleshooting '503 Service Unavailable' errors, click the following article number to view the article in the Microsoft Knowledge Base:
305030For additional information about "HTTP/1.1 503 Service Unavailable" errors, click the following article number to view the article in the Microsoft Knowledge Base:
(https://support.microsoft.com/kb/305030/ )How to troubleshoot the "503 Service Unavailable" error message in Outlook Web Access 2000
(https://support.microsoft.com/kb/282230/ )Error message "HTTP/1.1 503 Service Unavailable" on multiple Web sites on single server
Article ID: 840182 - Last Review: October 25, 2007 - Revision: 4.3