# yaml-language-server: $schema=../../../../schema/control.schema.json
id: CB-M365-TENANT-004
title: Restrict access to group features in My Groups
finding:
  title: Users can browse and manage groups in My Groups
  description: Any user can open My Groups to list the organization's groups and their members, which helps reconnaissance after an account compromise.
status: active
profiles: [hardened]
risk:
  severity: low
assessment: manual
tags: [entra-id, groups, my-groups, reconnaissance]

setting:
  location: Microsoft Entra admin center > Entra ID > Groups > General > Restrict user ability to access groups features in My Groups
  default_value: "No"
  recommended_value: "Yes"

description: |
  The group setting **Restrict user ability to access groups features in My Groups** is set to
  **Yes**: non-administrators cannot use the group features of the My Groups portal
  (https://myaccount.microsoft.com/groups). Group and User Administrators keep read-only access
  there.
rationale: |
  My Groups lets users discover groups, their owners and members, and request to join them. An
  attacker with a regular account uses it to map teams and pick targets. Restricting the portal
  reduces this exposure when groups are managed by administrators or by Teams.
impact: |
  Users no longer create or manage groups from My Groups; owners manage membership in Teams,
  Outlook or through the service desk. Self-service join requests stop working.
notes: |
  The setting has no public API.

audit:
  manual: |
    1. Sign in to the Microsoft Entra admin center (https://entra.microsoft.com) as at least a
       Global Reader.
    2. Browse to **Entra ID** > **Groups** > **General**, section **Self Service Group
       Management**.
    3. Fail if **Restrict user ability to access groups features in My Groups** is **No**.

remediation:
  manual: |
    1. Sign in to the Microsoft Entra admin center as at least a Groups Administrator.
    2. Browse to **Entra ID** > **Groups** > **General**.
    3. Set **Restrict user ability to access groups features in My Groups** to **Yes** and select
       **Save**.
  rollback: |
    Set the option back to **No**.

references:
  - title: Set up self-service group management in Microsoft Entra ID
    url: https://learn.microsoft.com/entra/identity/users/groups-self-service-management
    publisher: Microsoft
    kind: vendor-doc
    accessed: 2026-10-24
mappings:
  - framework: cis-m365
    framework_version: "7.0.0"
    id: "5.1.3.2"
    relation: equivalent
  - framework: nist-800-53r5
    framework_version: "5.1.1"
    id: AC-6
    relation: related
threats:
  - framework: mitre-attack
    id: T1069.003
related_controls:
  - id: CB-M365-TENANT-003
    type: related
  - id: CB-M365-TENANT-005
    type: related

authors:
  - name: Alice
    github: Sn0wAlice
introduced_in: 0.1.0
created: 2026-10-24
updated: 2026-10-24