Connections Fail with an ORA-12638 if the OS client User in Not in the Same Domain as the Database Server (Doc ID 308929.1)

Last updated on MAY 19, 2017

Applies to:

Oracle Net Services - Version 9.2.0.6 and later
z*OBSOLETE: Microsoft Windows

Symptoms

Both external and database authenticated user connections fail with an ORA-12638 when the client OS user is not in the same domain as the database server. 

Cause

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