XWEB: OWA Setup Error Message: There Are No More Endpoints Available from the Endpoint Mapper

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Article ID: 245273 - View products that this article applies to.
This article was previously published under Q245273
Important This article contains information about how to modify the registry. Make sure to back up the registry before you modify it. Make sure that you know how to restore the registry if a problem occurs. For more information about how to back up, restore, and modify the registry, click the following article number to view the article in the Microsoft Knowledge Base:
256986 Description of the Microsoft Windows registry
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SYMPTOMS

When you attempt to install Outlook Web Access (OWA) with a firewall between the Microsoft Internet Information Server (IIS)/OWA server and the Exchange Server computer, you receive the following error message:
There are no more endpoints available from the endpoint mapper.

CAUSE

During the installation of OWA, the Exchange Server installation program needs to bind to the system attendant on the Exchange Server computer. If the port for the system attendant is being blocked by the firewall, the installation does not work.

RESOLUTION

Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall your operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.
To resolve this problem, statically map the system attendant port on the Exchange Server computer, and then open that port on the firewall. This allows the installation program to bind to the system attendant during installation. To do so requires you to restart the Exchange Server services. To statically map the system attendant port on the Exchange Server computer:
  1. Start Registry Editor (Regedt32.exe).
  2. Locate the following registry key:
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchangeSA\Parameters
  3. Add the registry value, TCP/IP port, as a DWORD value, and specify the port to be used. Set the RADIX to decimal when you enter the value.

    NOTE: The DWORD value must be in decimal. The port must be above 1024, preferably above 5000.
  4. Quit Registry Editor.
You must also statically map the information store and the directory service, and open those ports on the firewall.

MORE INFORMATION

For more information, click the following article number to view the article in the Microsoft Knowledge Base:
176466 XGEN: TCP Ports and Microsoft Exchange: In-depth Discussion

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Article ID: 245273 - Last Review: October 28, 2006 - Revision: 3.6
APPLIES TO
  • Microsoft Outlook Web Access 5.5
  • Microsoft Outlook Web Access 5.5 SP 1
  • Microsoft Exchange Server 5.5 Service Pack 2
  • Microsoft Exchange Server 5.5 Service Pack 3
  • Microsoft Exchange Server 5.5 Standard Edition
Keywords: 
kbprb KB245273
Retired KB Content Disclaimer
This article was written about products for which Microsoft no longer offers support. Therefore, this article is offered "as is" and will no longer be updated.

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