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

ID: Q245273

The information in this article applies to:
  • Microsoft Outlook Web Access, version 5.5
  • Microsoft Outlook Web Access, version 5.5 Service Packs 1, 2
IMPORTANT: This article contains information about editing the registry. Before you edit the registry, make sure you understand how to restore it if a problem occurs. For information about how to do this, view the "Restoring the Registry" Help topic in Regedit.exe or the "Restoring a Registry Key" Help topic in Regedt32.exe.

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

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. The instructions for statically mapping the system attendant port on the Exchange Server computer follow:

WARNING: Using Registry Editor incorrectly can cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk.

For information about how to edit the registry, view the "Changing Keys and Values" Help topic in Registry Editor (Regedit.exe) or the "Add and Delete Information in the Registry" and "Edit Registry Data" Help topics in Regedt32.exe. Note that you should back up the registry before you edit it. If you are running Windows NT, you should also update your Emergency Repair Disk (ERD).

  1. Start Registry Editor (Regedt32.exe).


  2. Under the HKEY_LOCAL_MACHINE subtree, go to the following subkey:


    3. SYSTEM\CurrentControlSet\Services\MSExchangeSA\Parameters
  3. Add the registry value, TCP/IP port, as a DWORD value, and specify the port to be used. The RADIX should be set to decimal when you enter the value.

    NOTE: The DWORD value should be in decimal. The port must be above 1024.


  4. Quit Registry Editor.


For additional information on questions regarding statically mapping the system attendant port, click the article number below to view the article in the Microsoft Knowledge Base:
Q148732 XADM: Setting TCP/IP Port Numbers for Internet Firewalls
You should also statically map the information store and the directory service, and open those ports on the firewall.


MORE INFORMATION

For additional information, click the article numbers below to view the articles in the Microsoft Knowledge Base:

Q155831 XADM: Setting TCP/IP Ports for Exchange and Outlook Client Connections Through a Firewall
Q176466 XGEN: TCP Ports and Microsoft Exchange: In-depth Discussion

Additional query words:

Keywords :
Version : WINDOWS:5.5
Platform : WINDOWS
Issue type : kbprb


Last Reviewed: November 13, 1999
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