The following errors are occurring in the Windows Event Viewer for each Oracle log in intiated by Toad. The user is logging in succesfully with a regular Oracle username and password. There is no windows authentication and there are no errors displayed within Toad.
This is not a Toad issue. Windows Security Auditing is enabled for the server that Toad is installed on. Error appears to be happening because the following is set in the SQLNET.ORA file of the Oracle Client being used to connect within Toad.
SQLNET.AUTHENTICATION_SERVICES= (NTS)
In the sqlnet.ora file, either set
SQLNET.AUTHENTICATION_SERVICES= (none)
or
comment out the line
# SQLNET.AUTHENTICATION_SERVICES= (NTS)
