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Fix 'Cannot Connect to Exchange Online' in PowerShell - Repair Windows Defender Service Corruption-Windows Security Blocking Port Even When Off

2026-06-14 06:06:16
Fix 'Cannot Connect to Exchange Online' in PowerShell - Repair Windows Defender Service Corruption-Windows Security Blocking Port Even When Off

Result check

  • Keep one change per test run so you know which step helped.
  • Undo temporary changes after the issue is confirmed.