PRB: Oracle TNS: Authentication Service Initialization Error

 Last reviewed: March 13, 1998
Article ID: Q178391
The information in this article applies to:
  • Microsoft ODBC for Oracle, version 2.0 (Build 2.73.7269)
  • Microsoft Data Access Components, version 1.5

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          : odbcOracle kb3rdparty
Version           : WINDOWS:1.5
Platform          : WINDOWS
Issue type        : kbprb

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Last reviewed: March 13, 1998
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