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Fix Microsoft Teams Authentication Loop Issue - How to Fix Windows Security Proxy Error 0x80072efd-How to Fix '404 Not Found' in Command Prompt on Windows 10

2026-06-14 05:29:03cloud-software
Fix Microsoft Teams Authentication Loop Issue - How to Fix Windows Security Proxy Error 0x80072efd-How to Fix '404 Not Found' in Command Prompt on Windows 10

Final checklist

  • Confirm that the same symptom is gone after a restart or refresh.
  • Keep the smallest working change and undo temporary diagnostic settings.

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