How to fix the Oracle error ORA-12689: Server Authentication required, but not supported?

In this post, you’ll learn more about the Oracle ErrorORA-12689: Server Authentication required, but not supported with the details on why you receive this error and the possible solution to fix it.

Oracle Error Description

ORA-12689: Server Authentication required, but not supported

Reason for the Error ORA-12689: Server Authentication required, but not supported

Server Authentication is required for this connection, but not supported by both sides of the connection.

How to fix the Error ORA-12689: Server Authentication required, but not supported ?

You can fix this error in Oracle by following the below steps

Make sure both sides of the connection have the correct version of Advanced Networking Option, and that the Authentication Adapter supports Server Authentication.