Uncover Hidden Permissions and Risks in Microsoft 365.

365 Permission Manager, developed by Hornetsecurity, empowers Microsoft 365 admins and security teams to detect, manage, and eliminate hidden access risks across SharePoint, OneDrive, and Teams. With clear visibility, smart automation, and simple controls, it helps organisations secure sensitive data, maintain compliance, and stay in control of evolving permission structures.

The Challenge: Unseen Access Risks in Microsoft 365

SharePoint and Microsoft 365 make it easy to collaborate—but also easy to lose control. Nested groups, outdated permissions, and hidden guest access create blind spots that traditional tools struggle to surface.

Key concerns include:

  • Users with access they shouldn’t have
  • Permissions buried inside complex folder trees
  • Obscured full-control rights disguised as “Read”
  • Delayed offboarding of former employees
  • Difficulty tracing who has access to what

Without full visibility, your organisation could be vulnerable to data leaks, non-compliance, or insider threats.

Fragmented Group Models Obscure True Access

In Microsoft 365, group membership is scattered.

Some data lives in Entra ID (formerly Azure AD), while legacy SharePoint Groups operate on a separate system. This makes tracking user access across platforms confusing and inconsistent—even for administrators.

This complexity slows down investigations, complicates audits, and increases the risk of unnoticed exposure.

365 Permissions Manager solves this by centralising group visibility across Microsoft 365—making it faster and safer to manage access.

Missing Tree View; SharePoint Access Audit Issues

In this video, we demonstrate how difficult it can be to manage unique permissions in SharePoint Online.

Without a clear folder hierarchy or centralised view, understanding who has access to what becomes a manual, time-consuming task—leaving your organisation exposed to hidden risks.

See why this is one of the biggest permission challenges in Microsoft 365—and why a solution like 365 Permissions Manager can help.

Misleading Permission Labels Hide Full Access

In Microsoft 365, permission levels can be customised—and that’s a problem.

A malicious actor or careless admin could create a permission level named “Read,” but assign it full control privileges. From a user’s perspective, it appears harmless. In reality, it provides unrestricted access.

Even when reviewing permissions, SharePoint may display the standard “Read” definitions, masking the fact that the custom level is far more powerful.

This kind of manipulation can go unnoticed—and open the door to unauthorised actions without raising alarms.

Hidden Document Libraries Enable Silent Exfiltration

SharePoint allows admins to create document libraries that are effectively invisible to most users.

These libraries don’t appear in standard navigation, and permissions can be tightly restricted. This makes it possible to copy and store sensitive files out of sight.

A guest user could then be granted full access to that hidden library—bypassing traditional monitoring or review processes.

Without centralised visibility, these libraries can become blind spots where data is quietly extracted without detection.

The Solution

Regain Visibility and Secure Access with 365 Permissions Manager

Whether you’re a Microsoft 365 Admin or a CISO, 365 Permissions Manager gives you the tools to uncover hidden access, correct misconfigured permissions, and streamline security management.

Easily identify risks, monitor violations, and take control of your Microsoft 365 environment—all from one central dashboard.

Expose Hidden Access with Clear Visibility

Folder Tree View

365 Permissions Manager gives you a clear, hierarchical view of SharePoint folders. See every folder and its permissions in one place—no more hidden or overlooked access rights.

Quickly identify who can access any file or folder with a simple, transparent display.

Take Immediate Action with Bulk Controls

Bulk Actions & Reports

With 365 Permissions Manager, admins see exactly what users see. If an account is compromised, remove all permissions instantly from a single screen with one click.

Avoid risky delays—block access immediately, even before M365 completes offboarding.
Generate detailed reports showing exactly what files users can access and review permissions across all sites and OneDrives.

Maintain Control Over All Permissions

Complete Oversight & Authority

365 Permissions Manager ensures CISOs and admins have total control over current and future permissions.

Set and enforce security policies that align with organisational and regulatory requirements.

Empower employees through audit and reporting features, increasing awareness and reducing admin workload—while maintaining complete authority over access.

Why Hornetsecurity 365 Permission Manager?

  • Designed by Hornetsecurity, experts in Microsoft 365 security
  • Helps enforce internal security policies and compliance standards (e.g., GDPR, ISO)
  • Reduces admin workload through automation and bulk actions
  • Gives IT teams and CISOs complete visibility and faster response capabilities

Part of the 365 Total Protection suite for unified Microsoft 365 defence

Who Benefits from 365 Permission Manager?

  • Microsoft 365 Admins
  • Security & Compliance Teams
  • CISOs and IT Risk Managers
  • Internal Auditors and Data Officers

Whether you’re managing a single department or thousands of users, 365 Permission Manager provides the clarity, control, and compliance support modern IT teams need.

Take Back Control with 365 Permissions Manager

Secure smarter. Act faster. Stay compliant.

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