
AaronR.75679 (Customer) asked a question.
We have a single user that is having issues with okta. We have AD delegation enabled and I can login to the domain with the credentials but when trying to login to okta it says invalid username/credentials. Not sure what else to try as we've disconnected the user from ad and re synced and connected it changed passwords and still the same thing. Anything else we can try?

Hi Aaron,
Thanks for posting your question here, on our help center`s discussions.
I would recommend using the full email address as far as login goes.
In the log snippet, if you see rich client authentication failure, it's usually caused by stored credentials(wrong credentials) on the PC itself. If it is a windows machine then you will need to check the Credentials Manager from windows and delete the O365 accounts that are stored there.
If this is a mac device causing the issue then you will need to check the Keychain for any stored credentials.
Other than this, I wouldn't find myself in such scenario, unless, the password is indeed typed in incorrectly.
If the above didn't help, I would recommend opening a support ticket with us for further analyse of the logs.
Thank you,
Dragos Milea
Okta Global Customer Care Team