It sounds like a synchronization issue. First, check if the system clock on the client machine and the authentication server are aligned, as OTPs are time-sensitive. Make sure the third-party OTP generator is configured properly, and test it separately to ensure it’s generating valid codes of windows login Also, confirm that Active Directory integration is functioning correctly and that the user accounts are properly linked to OTP tokens. Clearing cached credentials or reinstalling the OTP software might also help resolve issues. Finally, check logs for any error messages that could pinpoint the cause.
Great points! Another thing to check is whether the OTP method you’re using is compatible with your Windows login setup. If it’s a hardware token, try testing it on a different device to rule out a token issue. If you’re using a mobile app, ensure the app is updated to the latest version. Also, don’t forget to check the event logs on the server and client for any specific error messages that could point to the root cause.