Intune Local Admin Removal for CMMC Level 2

Local admin rights can undo months of security work in one bad click. If a standard user can install tools, disable protections, or change system settings, your Windows baseline is weaker than it looks.

I treat Intune local admin removal as a practical least-privilege control for CMMC Level 2, not a magic compliance shortcut. When I manage devices that touch CUI, I want daily user accounts out of the local Administrators group, support access separated, and a rollback path ready before deployment.

Why local admin removal matters for CMMC Level 2

CMMC Level 2 expects controlled access, role separation, and disciplined configuration management. Removing unnecessary admin rights supports that goal because it limits what a normal user can change on a device. It also reduces the chance that malware can run with full system control.

Microsoft ties identity and access practices to CMMC in its CMMC Level 2 access control guidance. I use that guidance as a reference point, especially when I map least privilege to AC.L2-3.1.4 and related access control practices. This step helps, but it does not guarantee certification by itself.

For me, the value is simple. Fewer local admins means tighter Endpoint Security, stronger Device Hardening, and less drift across the fleet. That matters even more in Small Business IT, where one person may cover help desk, security, and systems work on the same day.

It also supports separation of duties. I never want a user’s everyday account to double as a privileged account. If support staff need admin access, I give them a dedicated path, a dedicated account, and clear logging.

How I configure the Intune policy without breaking support

In Intune, I start with Endpoint security > Account protection > Local user group membership on Windows 10 and 11. Then I target the local Administrators group.

I use two policy approaches, and the difference matters. Remove (Update) is useful when I need to remove known users or groups from Administrators. However, it can be messy if group membership has changed over time. Add (Replace) is stricter because I define exactly who stays in the group. On high-value devices, that is usually the safer option.

There is one major gotcha. Windows will not let me remove the built-in local Administrator account from the device. Instead, I manage it with Microsoft LAPS, rotate the password, and rename or disable it according to policy.

I do not mix Intune local user group membership with legacy Restricted Groups on the same device. One control plane is enough.

I also protect support access from day one. If I need local admin for break-glass recovery, I keep it tied to a managed local admin account and not a human user’s daily sign-in. If I allow Entra-based device admin roles, I review them closely and keep them limited.

For new builds, I prefer to apply the policy during Autopilot enrollment. That way users never receive local admin rights in the first place. Cleanup is harder than prevention.

Device targeting, exceptions, and rollout sequencing

I never push this to every Windows endpoint at once. A rushed rollout can lock out support tools, vendor apps, or field devices that still depend on elevated rights.

My sequence is simple:

1. I validate LAPS, recovery access, and remote support first.
2. Next, I pilot with IT-owned devices and a small user group.
3. Then I expand by device type, not by the whole company.
4. Finally, I move sensitive systems and general users after I confirm support workflows.

Targeting matters as much as the policy itself. I scope assignments to device groups, not mixed user groups, because device state is what I care about. I also keep a temporary exclusion group for rollback. If something fails, I can remove that device from the assignment fast.

Exceptions need rules. I document the reason, owner, approval date, and expiry date. I also prefer device-based exceptions over user-based exceptions. That keeps privilege tied to the asset, not to a person who may move roles later.

This is where real-world operations show up. Restaurant POS Support, Kitchen Technology Solutions, and some older Data Center Technology workloads may still need short-term admin access for vendor maintenance. When that happens, I use time-bound exceptions or scripted remediation, not permanent membership. A practical community example is this Intune Remediations approach for local admin control.

How I verify removal and keep evidence

Policy assignment alone is not proof. I verify on the device.

My first check is local group membership, usually with remote PowerShell or a scripted check that reads the Administrators group directly. I also confirm the user can no longer perform admin-only tasks. If Intune shows success but the device still has stale membership, I treat that as an issue to investigate, not a report to trust blindly.

For tricky membership behavior, I keep this reference handy on using Intune to remove local admins. It is a useful reminder that removing a group object is not always the same as removing every effective admin path.

For CMMC readiness, I keep evidence that an assessor can follow. That includes policy settings, assignment groups, pilot results, exception records, and proof of review. This one control supports broader Cybersecurity Services, but it also fits larger work such as Cloud Infrastructure, Office 365 Migration, Cloud Management, Infrastructure Optimization, and Secure Cloud Architecture. In my experience, the same discipline improves Managed IT for Small Business, Technology Consulting, IT Strategy for SMBs, Digital Transformation, and Business Continuity & Security. It is also part of the Innovative IT Solutions and Tailored Technology Services I expect from a true Business Technology Partner.

Local admin rights look small until they cause a big problem. I get better control, cleaner audit evidence, and fewer avoidable support risks when I remove them with care.

The strongest result comes from least privilege plus good operations. If Intune policy, LAPS, testing, and exception handling all work together, CMMC Level 2 conversations get much easier.