Note: This is an old article. However, the troubleshooting tips may still apply to newer versions.
Testing an Oracle global database connection results in an error message.
ORA-017: invalid username/password; logon denied
The text-based format of the global database connection allows you to enter an invalid set of security parameters.
Switch off integrated security in the global database connection when specifying Oracle user name and password.
Author: Doug Wynkoop