"Extension SMTP could not be loaded" error message when you attempt to open the Internet Mail Service properties page after deleting Internet Mail Service extension object from Add-Ins container (250907)


The information in this article applies to:

  • Microsoft Exchange Server 5.5
This article was previously published under Q250907

SYMPTOMS

When you delete the Extension for Internet Mail Service For i386 from the Add-Ins container in the Exchange Administrator program, and then attempt to open the Internet Mail Service properties page, you may receive the following message:
Extension SMTP could not be loaded.
The extension for Microsoft Exchange Administrator's CPU type has not been installed in the site.
Microsoft Exchange Administrator
ID no: c1031667

CAUSE

This behavior can occur when the Exchange Administrator program cannot load the Imcadmin.dll file because the extension object is missing or has been deleted from the Exchange Administrator directory.

RESOLUTION

Caution Using the raw mode of the Exchange Administrator program (admin /r) incorrectly can cause serious problems that may require you to reinstall Microsoft Windows NT Server, Microsoft Exchange Server, or both. Microsoft cannot guarantee that problems resulting from the incorrect use of raw mode can be solved. Use raw mode at your own risk.

Note If you click Ignore instead of Abort or Retry in the error message box, the Internet Mail Service properties page opens.

To resolve this behavior, re-create the directory extension object in raw mode of the Exchange Administrator program. Follow these steps:
  1. Run Windows Explorer to confirm that X:\Exchsrvr\Add-Ins contains the Imcadmin.dll file. If the file is missing, you can replace it from the Setup\I386 or Alpha\Add- ins\Smtp\I386 or Alpha directory on the Microsoft Exchange Server CD.

    Note If this file exists on another Exchange Server computer on the same site, it is dynamically replicated when the Internet Mail Service property page is opened.
  2. Log on to Exchange Server with the Exchange Server Service account.
  3. At the command prompt, use the cd command to change to the Exchsrvr/Bin directory.
  4. Use the admin /r command, and then press ENTER. This opens the Exchange Administrator program in raw mode.
  5. On the site level, expand the Configuration container, and then click the Add-Ins container.
  6. From the File menu, click New Other, and then click Raw Object.
  7. In the New Raw Object dialog box, click Admin-Extension, and then click OK.
  8. In the Properties page, click Directory Name, and under Edit Value, type SMTP:i386 and then click Set.
  9. Click File-Version, and under Edit Value, type the hexadecimal value for the version and then click Set.

    Note You can find the hexadecimal number by looking at the same directory object on another Exchange Server 5.5 computer that is running the same service pack. This value can be found in the site level, expand the Configuration container, and then click the Add-Ins container. Select the Raw Properties of "Extensions for Internet Mail Service for I386". Then choose the File-Version object.

    Note For example, the file version for Exchange Server 5.5 Service Pack 4 is 17005D0A050000500.
  10. Click Admin-Extension-Dll, and under Edit Value, type Imcadmin.dll, and then click Set.
  11. Click OK.
  12. Expand the Add-Ins container, open the SMTP:i386 Properties page, and in the Display Name box, type Extension for Internet Mail Service for i386, and then click OK.
  13. Expand the Connections container, and then attempt to open the Internet Mail Service Properties page. If you cannot access the Internet Mail Service Properties page, delete and then re-create the extension object.
Modification Type:MinorLast Reviewed:4/28/2005
Keywords:kbprb KB250907
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