We have a user attempting to make an API call to Salesforce and will intermittently receive this message: INVALID_LOGIN: Invalid username, password, security token; or user locked out..
It doesn't happen every time, but it's happening more and more. I, myself, am not development savvy and am unsure how to assist.
Login history indicates the following:
We have already reset the password and security token, and his profile is API Enabled.
Other than that, I am not sure where to go next...?