Microsoft 365 enforces a strict password policy that requires passwords to include uppercase letters and numbers. If your password contains only lowercase letters and digits, it may not meet the required format—even if it was accepted during setup due to system exceptions.

🧭 Troubleshooting Checklist

• ✅ Check for uppercase letters: Ensure your password includes at least one capital letter
• ✅ Verify Caps Lock: If Caps Lock is on, all letters will be uppercase—this may cause login errors
• ✅ Confirm first character: Some systems expect the first character to be capitalized
• ✅ Try alternate casing: If unsure, test variations with capital letters in different positions

🔐 Still Can’t Log In?

• If you’ve tried all variations and still can’t access your account, contact your System Help Desk
• They can verify your account status and assist with password reset procedures

📚 Reference

• Password Policy Recommendations for Microsoft 365