References

Error-code database

62 codes across Intune SCEP, NDES/AD CS, RADIUS/802.1X and Entra sign-in (AADSTS) — each with meaning, causes and concrete fixes.

Cheat sheets

6 one-page printable references — endpoints & ports, certificate formats, EAP methods, Azure naming, Graph PowerShell auth.

Glossary

46 terms from SCEP to DMARC alignment, cross-linked to tools and guides.