Sentinel Identity

Microsoft identity and infrastructure guidance for IT teams.

Practical troubleshooting, architecture notes, and implementation guides for Microsoft Entra, Active Directory, Microsoft 365, Conditional Access, passkeys, and Windows DNS.

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Identity foundationsUnderstand Active Directory from the ground up →Policy architectureSee how Conditional Access evaluates a sign-in →Passwordless identityLearn how Microsoft Entra passkeys work →

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Authentication

14 articles

Protocols, tokens, sign-in flows, federation patterns, and the backend mechanics behind authentication systems.

Microsoft Entra

14 articles

General Microsoft Entra architecture, operations, and identity platform articles.

Domains and DNS

12 articles

Custom domains, DNS records, MX, SPF, DKIM, DMARC, and Microsoft 365 domain onboarding.

Conditional Access

10 articles

Conditional Access policy behavior, device checks, browser support, and operational troubleshooting.

Tenant Operations

10 articles

Tenant recovery, device join, Primary Refresh Token behavior, and day-to-day Microsoft Entra operations.

Passkeys

9 articles

Passkey architecture, registration, attestation, compatibility, rollout planning, and troubleshooting in Microsoft Entra.

Active Directory

8 articles

Windows Server identity, domain controllers, AD Sites, replication, home labs, and hybrid foundations.

Agent ID

1 article

Microsoft Entra Agent ID coverage, including security architecture, governance, and network controls for agents.

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