Microsoft KB Archive/178391

= PRB: Oracle TNS: Authentication Service Initialization Error =

Article ID: 178391

Article Last Modified on 12/3/2003

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APPLIES TO


 * Microsoft Open Database Connectivity 2.0
 * Microsoft Open Database Connectivity 2.0
 * Microsoft Open Database Connectivity 2.0
 * Microsoft Open Database Connectivity 2.5
 * Microsoft Data Access Components 2.0
 * Microsoft Data Access Components 2.1
 * Microsoft Data Access Components 2.5
 * Microsoft Data Access Components 2.6

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This article was previously published under Q178391



SYMPTOMS
Oracle databases authenticate users that are logged on with SQL*Net Authentication services. This service works fine for users logged into Oracle through SQLPlus; however, when the logged on user is a service like Internet Information Server, the authentication fails with the following error:

[Microsoft][ODBC driver for Oracle][Oracle]ORA-12641: TNS:authentication service failed to initialize



CAUSE
This is a known limitation of SQL*Net Authentication.



RESOLUTION
The problem may be corrected by editing the Sqlnet.ora file. This configuration file is usually stored in the Network/Admin subdirectory of the Oracle Home directory. The following line needs to be added to this file: SQLNET.AUTHENTICATION_SERVICES = (none)



STATUS
Microsoft is researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.

Keywords: kboracle kbdatabase kbprb kb3rdparty kbdriver KB178391

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