Applies to:Information in this document applies to any platform.
"ORA-12638: Credential Retrieval Failed" message when log in to the database. User is unable to log in to the database.
in "sqlnet.ora" there is an entry "QLNET.AUTHENTICATION_SERVICES= (NTS)"
This is used to support for authenticating using Windows credentials
Replacing the line:
in sqlnet.ora. Find your sqlnet.ora in $ORACLE_HOME/network/admin folder.