sqlplus / as sysdba throws error: insufficient privileges
I am able to connect to the database using "sqlplus / as sysdba". I need to grant new user similar setup on my windows server. I already added the user to ORA_DBA group. But still he is unable to connect to the database..
error throws: ORA: 1031 ... insufficient privileges
SQLNET ORA contains: SQLNET.AUTHENTICATION_SERVICES = (NTS)
Let me know if I am missing some thing