How to fix it

  1. Navigate to User Administration > Users and search for the affected user by User ID or email.
  2. Open the user record and check the Active checkbox. If unchecked, check it and click Update.
  3. Check the Locked out field. If true, uncheck it and clear the Failed attempts field by setting it to 0.
  4. Verify the user is accessing the correct URL by checking your instance name. Confirm they're using https://yourinstance.service-now.com and not a dev or test instance URL.
  5. If using SSO, check the user's Source field in their user record. Navigate to System Security > Authentication > Identity Providers and verify the corresponding provider is active.
  6. For MFA issues, go to System Logs > System Log > Authentication and filter by the user's ID to see specific MFA error messages.
  7. If MFA errors are present, go to the user record and click Reset Multi-Factor Authentication from the related links to clear their registered devices.
  8. Check for IP restrictions by reviewing the Location field in the user record. If populated, verify the location record allows the user's current IP address.
  9. For local authentication, check if password reset is needed by looking at the Password needs reset field or using Set Password from the user record.
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After making changes, have the user clear their browser cache and try logging in from an incognito/private window to eliminate browser-related issues.