Knowledge Base

XADM: Setup Fails with "Self Registration.Cdonts.dll Failed" Error

Article ID: 192192

Article Last Modified on 10/28/2006

Microsoft Exchange Server 5.5 Standard Edition

This article was previously published under Q192192

SYMPTOMS

The following message may appear during the installation of Service Pack 1 or the set up of the Internet Mail Service:

Self registration of the DLL <Winnt root>\system32\cdonts.dll failed: 0d

CAUSE

Cdonts.dll is not present in the <Winnt root>\System32 directory.

WORKAROUND

To work around this problem, copy Cdonts.dll from the Exchange Server installation disc to the System32 directory.

It may also be necessary to register Cdonts.dll using the following command:

<Winnt root>\System32\Regsvr32.exe <Winnt root>\System32\ Cdonts.dll.

This registration takes only a few seconds to complete.

MORE INFORMATION

Cdonts.dll is installed by default when Exchange Server 5.5 is installed. Uninstalling other programs may cause this file to be removed. For example, the Windows NT Option Pack uninstaller may remove Cdonts.dll.

Note that the versions of Cdonts.dll included with the Option Pack and on the Exchange Server 5.5 installation disc are identical, although they have different file dates (11-2-97 versus 11-4-97).

Keywords: kbprb KB192192