How do you review risky users and sign-ins in Microsoft Entra ID Protection?

What to look at first in a risky user or sign-in review

Start with the highest-risk records and work outward from there. The practical goal is to decide whether the signal reflects a real compromise, a benign user pattern, or automation. In Entra ID Protection, the most useful context is the evidence behind the alert, not the alert label by itself, because location, device, IP reputation, and authentication strength often change the interpretation.

Recent account changes matter because they can turn an otherwise ordinary sign-in into a materially different event. A password reset, MFA reset, device enrollment, new browser profile, or role change can explain some risk signals, but it can also be part of the attacker’s cleanup or persistence path. Review the account’s recent activity alongside the risky sign-in rather than in isolation.

When the review touches broader identity operations, use the same discipline you would apply to an access review process. Access Reviews and Certification Guide is useful here because the main failure mode is over-trusting a risk score and skipping the evidence check that tells you whether the access path is still justified.

How to separate user behaviour from attack activity

Normal user behaviour usually has continuity. You see familiar geography, a stable device pattern, a consistent authentication method, and a plausible business reason for the activity. Attack activity is more likely when the pattern is discontinuous, such as impossible travel, unfamiliar infrastructure, repeated failed attempts, sudden token reuse, or a sign-in that succeeds only after weak or downgraded authentication.

Automation is a separate case and should not be treated as a human login pattern. Credential stuffing, scripted retries, and token abuse often create noisy but structured patterns, for example bursts across many accounts, multiple user agents, or repeated attempts that do not match ordinary interactive use. A good review asks whether the account is being used in a way the owner would actually produce, or whether the signal looks machine-driven.

For Entra ID environments, it helps to understand the hardening and trust boundaries around the identity plane itself. Active Directory and Entra ID Hardening Guide is relevant because sign-in review becomes much easier when conditional access, privileged groups, and delegation are already controlled tightly.

When sign-in evidence points to token theft or consent abuse, the review should move beyond the individual event and consider whether the attacker may already have a foothold in the tenant. Entra ID Applications and Consent Guide supports that line of inquiry because malicious app consent and risky OAuth patterns can look like ordinary application activity until you inspect what permissions were granted.

What to do after you confirm a true positive

Once the evidence supports a real compromise, treat the sign-in as an incident response trigger, not just a one-off user issue. The immediate question is whether the account, session, token, or linked application access has already been abused elsewhere. If the account has privileged roles or broad tenant access, assume the blast radius is larger than the original alert.

Remediation should match the suspected mechanism. Password reset alone is not enough if the sign-in likely involved a stolen session, refresh token, or OAuth grant. You may need to revoke sessions, remove malicious app consent, rotate secrets tied to the account or application, and check whether the user or connected service was used for lateral movement. If the compromise may have touched identity infrastructure, recovery steps must be coordinated with containment and forensic preservation.

That is why identity incident handling should be tied to a recovery playbook before the event grows. Identity Recovery Guide is a useful follow-on reference when a risky sign-in is part of a broader identity compromise and you need to think about restore, rebuild, and trust re-establishment.

Risk and Threat Considerations

Risk comes from treating a risky sign-in as a single event instead of a possible indicator of broader identity abuse. The same account can be used for password spraying, token replay, session hijacking, or privilege escalation, and the observable sign-in may be only the last step in the attack chain.

Failure mechanism: The review process fails when teams accept the alert at face value, ignore correlation across accounts and sessions, or dismiss token-based activity because the password was not visibly changed. That leaves the attacker’s access path intact and can allow the same identity to be reused for further abuse.

Impact: Missed compromise can lead to mailbox access, application abuse, tenant-wide privilege escalation, persistence through consented apps or tokens, and delayed containment. In Entra ID, that often means the real damage happens after the first risky sign-in, not during it.

Practitioner Guidance

What to prioritise: Triage the highest-risk sign-ins first, but rank them by potential blast radius, not just severity labels. A sign-in on a privileged account, a token-related event, or a sign-in that coincides with a recent account change deserves more attention than a routine-looking login with a noisy risk score.

What to verify: Confirm whether the evidence is internally consistent, meaning the device, location, IP reputation, authentication strength, and recent account history all point to the same explanation. If one element does not fit, treat the case as unresolved until you can explain the mismatch.

Decision rule: If the activity is likely automated or token-driven, investigate the access path and session state before closing the alert. If the activity is clearly benign, document the pattern that made it safe to close so the same signal can be triaged faster next time.

Practitioner takeaway: The best review is evidence-led, not alert-led, because the question is rarely “is this risk label true” and more often “what access path is still live, and what else did that identity already touch?”

Related resources from NHI Mgmt Group

• Guide: Identity Threat Detection and Response (ITDR) Guide
• How do you block risky sign-ins with Conditional Access in Microsoft Entra ID?
• How do you investigate AI agent sign-ins in Microsoft Entra Agent ID?
• How do you block sign-ins from specific countries with Conditional Access in Microsoft Entra ID?
• How do you find sign-ins using legacy authentication in Microsoft Entra ID?