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27/06/2026 1:49 pm
TL;DR: The most common Microsoft 365 posture gaps are high-risk app permissions with no recent sign-ins, disabled Customer Lockbox, and weak admin session controls, according to Abnormal AI. Customers remediated 25,627 findings in November 2025 versus 1,081 in August, a pattern that is not just compliance drift. It is identity exposure that turns routine admin settings into persistent access paths.
NHIMG editorial — based on content published by Abnormal AI: Key insights into Microsoft 365 posture drift and common misconfigurations
Questions worth separating out
Q: How should security teams handle high-risk app permissions in Microsoft 365?
A: Treat app permissions as live entitlements, not one-time approvals.
Q: Why do persistent admin sessions increase Microsoft 365 risk?
A: Persistent admin sessions extend the life of privileged access after the original login event.
Q: What breaks when guest users are not tightly governed in Microsoft 365?
A: Guest identity sprawl breaks visibility and review discipline.
Practitioner guidance
- Review app permissions against current business use Inventory applications with high-risk permissions and verify that each one still has an active owner, a documented use case, and recent sign-in activity.
- Enforce short-lived administrative sessions Set strict sign-in frequency and disable persistent browser sessions for privileged accounts so admin access cannot survive indefinitely in a browser.
- Constrain guest and support access paths Create and maintain a dynamic group for guest users, then review whether guest collaboration is actually required.
What's in the full article
Abnormal AI's full analysis covers the operational detail this post intentionally leaves for the source:
- The exact Microsoft 365 posture findings and how Abnormal classifies each misconfiguration by severity.
- Tenant-by-tenant remediation workflow details that connect a finding to the specific admin center control to change.
- Industry-specific posture patterns across healthcare, financial services, and manufacturing.
- The deployment timing data showing how quickly teams close high-severity issues once posture visibility is in place.
👉 Read Abnormal AI's analysis of recurring Microsoft 365 posture misconfigurations →
Microsoft 365 misconfigurations: what IAM teams need to fix first?
Explore further
27/06/2026 3:18 pm
Microsoft 365 posture drift is an identity governance problem disguised as hygiene. The article shows that the most common gaps are not rare misconfigurations but repetitive failures in permission scoping, session expiry, and admin boundary enforcement. When those controls drift, the environment develops quiet access paths that are easy for attackers to exploit and hard for teams to notice early. The practitioner conclusion is that posture management must be treated as continuous identity governance, not a periodic cleanup exercise.
A few things that frame the scale:
- 1 in 4 organisations are already investing in dedicated NHI security capabilities, with an additional 60% planning to do so within the next twelve months, according to The State of Non-Human Identity Security.
- Only 1.5 out of 10 organisations are highly confident in their ability to secure NHIs, compared to nearly 1 in 4 for securing human identities.
A question worth separating out:
Q: Who is accountable when Customer Lockbox is left disabled?
A: Accountability sits with the teams that approve tenant access policy, because disabled Customer Lockbox can widen support access beyond the minimum necessary level. Security, IAM, and service owners should agree on who approves exceptions, who monitors support access, and who validates that privileged support pathways stay bounded.
👉 Read our full editorial: Microsoft 365 posture drift creates silent access paths for attackers
