A user reports they are unable to log in with valid credentials after a recent switch to an external identity provider. They are repeatedly prompted to enter their password, and logs show invalid token messages. Which action is the best way to begin troubleshooting?
Reinstall the entire environment and update all software
Change password complexity rules for newly created accounts
Disable extra verification requirements on the user account
Check clock settings on all systems to confirm they match
Time synchronization is critical for token validation in environments that rely on an external identity service. If the clocks on the involved systems are not aligned, tokens can fail. Rebuilding the entire environment or removing features does not typically address time-based token verification. Changing existing password rules does not resolve session or token mismatch problems caused by clock skew.
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Why is time synchronization critical for token validation?
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What is clock skew, and how does it affect authentication systems?
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How do you check and ensure all systems are on synchronized time?