What is Microsoft Entra ID?
Microsoft Entra ID is Microsoft's cloud-based identity and access management service, previously named Azure Active Directory. It stores the user accounts, groups, and device records for an organization and decides, at every sign-in, whether a person or device should be allowed into Microsoft 365, Azure, and any other application connected to it.
Every Microsoft 365 tenant has an Entra ID directory behind it. When an employee signs in to Outlook, Entra ID checks the password and applies multi-factor authentication, then evaluates Conditional Access policies that can require a compliant device, block sign-ins from unexpected countries, or demand a fresh authentication for sensitive applications. The same directory provides single sign-on to third-party services such as accounting or HR platforms, so one identity covers everything and can be disabled in one place when someone leaves. Higher license tiers add Privileged Identity Management for time-limited administrator rights and Identity Protection, which flags risky sign-ins based on Microsoft's threat signals. Organizations with an on-premises Active Directory can synchronize it to Entra ID so that both stay consistent.
For a small or mid-sized business Entra ID is usually the most important security system it owns and the least examined. A default tenant allows legacy protocols that skip multi-factor authentication, grants every user the ability to consent to third-party apps, and leaves administrator accounts protected by nothing more than a password. Conditional Access, which is included with Microsoft 365 Business Premium, fixes most of this, but only once the policies are designed and switched on.
NetSys manages Entra ID for its clients as part of its Microsoft 365 security service, starting with a review of the tenant's authentication methods, Conditional Access policies, administrator roles, and app consent settings. Privileged identity management is included in every managed agreement, so administrator rights become time-limited by default. Latoya Reed covers cloud and Microsoft 365 topics for NetSys.
Why it matters for a small business
If you use Microsoft 365, Entra ID is the lock on the front door of your business. Every mailbox and every document in SharePoint sits behind it. Attackers know this, which is why so many small business breaches start with a stolen or phished Microsoft password rather than with malware. The settings that stop those attacks already exist in your tenant; the question is whether anyone has configured them. A few hours spent on Conditional Access and administrator roles removes more risk than most hardware purchases, and it costs nothing beyond the license you already pay for.
Microsoft Entra ID: FAQs
What is Microsoft Entra ID used for?
Microsoft Entra ID manages user identities and controls access to Microsoft 365, Azure, and connected third-party applications. It handles sign-in, multi-factor authentication, single sign-on, device registration, and group membership, and its Conditional Access policies decide which sign-ins to allow based on user, device, location, and risk. Administrators use it to create and disable accounts and to review sign-in logs when something looks wrong.
Is Microsoft Entra ID the same as Azure Active Directory?
Yes. Microsoft renamed Azure Active Directory to Microsoft Entra ID in 2023. The service and its licensing tiers are the same; only the name changed, along with the broader Entra product family that groups related identity tools. Documentation and admin portals now use the Entra name, though many older guides and scripts still refer to Azure AD. On-premises Active Directory, the Windows Server product, is a different system and was not renamed.
Do I need Entra ID P1 or P2 for a small business?
Most small businesses need P1, which is included in Microsoft 365 Business Premium and provides Conditional Access, group-based licensing, and self-service password reset. P2 adds Privileged Identity Management, which gives administrators time-limited rights, and Identity Protection, which scores sign-in risk automatically. P2 is worth considering for companies with several administrators or regulatory obligations. Because licensing is per user, some businesses assign P2 only to the administrator accounts that use its features.
More terms
Microsoft Intune
Microsoft Intune is a cloud service that enrolls, configures, secures and updates a business's computers and mobile devices from one management console.
Microsoft Defender for Business
Microsoft Defender for Business is an endpoint security service for smaller companies, combining antivirus with detection, response and automated fixes.
Multi-Factor Authentication (MFA)
Multi-factor authentication (MFA) is a sign-in method that requires a second proof of identity, such as an app prompt or security key, beyond the password.
Microsoft 365 Copilot
Microsoft 365 Copilot is an AI assistant built into Word, Outlook, Teams and other Microsoft 365 apps that drafts and summarizes using your business data.
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