
ShaneP.78388 (Customer) asked a question.
I have a test user that creates multiple auth requests per minute. I have been increasingly seeing failed login events with the message. This is using the /api/v1/authn endpoint.
User login to Okta
failure: UNKNOWN_USER
There are no other error codes or information provided in these requests so troubleshooting is very difficult.

Hi @ShaneP.78388 (Customer) , Thank you for reaching out to the Okta Community!
Hard to say what is causing this without more context for your use case but typically, this error is generated when dealing when trying to import users from the AD using the AD agent(system.agent.ad.import_user), another case is when trying to import users from a CSV file (system.csv.import_user) or for example in some cases with Dekstop SSO integration, please see this example: https://support.okta.com/help/s/article/Desktop-SSO-IWA-is-failing-with-LoginResult-UNKNOWN-USER?language=en_US
Basically, the error event is fired when Okta is not able to identify the user in the source directory.
If my answer helped, remember to mark it as best to increase its visibility for other members of the Okta Community who might have the same questions as you.
Hope my answer helps!
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