
ChristophP.34074 (Customer) asked a question.
I have several new users in the organization. OKTA accounts have been set up identically to all other accounts. When these users try to log in to follow the activation steps they are receiving an error message "Unable to login". Nothing else. No hint, no error code. I can reproduce the problem on several machines and coming from different ISPs. I also tried using a VPN. One IT team member does not get the error message when trying to reproduce the problem. However, at the same time I can login with existing accounts having no problems. The problem only appears when new users start the first login to activate their account.
I reached out to OKTA support and they claim it is an ISP issue. Their suggestion is to reach out to the ISP. Thing is, I have this happen to users in the US, Germany, and the UK.I work from home and I am on Spectrum (I think previously Charter). That is not a small ISP. The user in Germany is on T-Mobile. Not sure yet about the UK, but I doubt that this is the issue.
I wanted to check here with others to see if you have seen something similar happen? Do you have a solution?

Hi @ChristophP.34074 (Customer) , thank you for contacting Okta Community!
While I do not have access to see all the relevant details here, there have been some similar situations in the past related to Active Directory-managed users. You could take a look at this article on “Active Directory authentication failed for unknown reasons: (1329)” and this error guide from Microsoft.
The best course of action would be for you to continue working on the support case you have open. The technical support engineer will have access to additional tools and information and be able to provide in-depth troubleshooting.
Regards.
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