This article was previously published under Q296436
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During the Exchange 2000 setup or upgrade process, Setup may stop, and an error regarding the registering of Exoledb.dll is displayed. In the Exchange 2000 Setup log, you may receive one of the following error messages:
regsvr32 /s exoledb.dll
failed, returning error code 5 (Access is denied).
Setup failed with 0xc103798a registering the base dav protocol.
This error may occur if the .dll files, upon which the Exoledb.dll file is dependent, are not registered.
To work around this error, manually register the dependent .dll files (Msdaurl.dll, Msdaipp.dll, and Oledb32.dll) by typing the following command from a command prompt where name.dll is the name of the .dll file that you want to register:
For example, to register the Msdaurl.dll file, type the following command from a command prompt:
Generally, the Msdaurl.dll, Msdaipp.dll and Oledb32.dll files are located in the %SystemRoot%\Program Files\Common Files\System\Ole DB folder. You need to run the regsvr32 command in the directory in which the .dll files are located.
After you register these files, you can click Retry in the Setup dialog box to allow Exchange Setup to register the Exoledb.dll and continue with Setup.
For additional information regarding usage of Regsvr32, click the article number below to view the article in the Microsoft Knowledge Base:
249873 Explanation of Regsvr32 Usage and Error Messages