Why Permissions Matter in SharePoint
Managing permissions is one of the most critical responsibilities of a SharePoint administrator. Poorly configured permissions can expose sensitive data to the wrong people or block team members from accessing the content they need. Understanding how SharePoint's permission model works is essential for maintaining a secure, functional environment.
The SharePoint Permission Hierarchy
SharePoint permissions are structured in a hierarchy, with each level inheriting permissions from the level above by default:
- Site Collection — The top-level container. Site collection administrators have full control over everything beneath.
- Site — Individual SharePoint sites within a collection. Can inherit or break inheritance from the parent.
- Library / List — Specific document libraries, lists, or apps within a site.
- Folder — Subfolders within a library.
- Item / File — Individual documents or list items.
By default, lower levels inherit permissions from higher levels. You can break inheritance at any level to assign unique permissions, but do this sparingly — it creates complexity that's hard to audit.
Built-In Permission Levels
| Permission Level | What It Allows |
|---|---|
| Full Control | Complete access — create, edit, delete, and manage permissions |
| Design | Edit pages, apply themes, manage site structure |
| Edit | Add, edit, and delete lists and library items |
| Contribute | Add and edit items, but cannot delete lists themselves |
| Read | View-only access to all content |
| View Only | View pages and list items; cannot download files |
SharePoint Groups: The Right Way to Manage Permissions
Rather than assigning permissions to individual users, best practice is to use SharePoint Groups. Groups let you manage a collection of users as a single unit, making it much easier to onboard new employees or change access levels.
Every SharePoint site comes with three default groups:
- Owners — Full Control
- Members — Edit (or Contribute)
- Visitors — Read
You can create custom groups for more granular scenarios, such as a "Finance Approvers" group with Contribute access to a specific library.
Breaking Inheritance: When and How
Breaking inheritance should be a deliberate, documented decision. Common scenarios include:
- A confidential HR document library that only HR staff should access.
- A project library where external partners need limited access.
- A specific item that needs to be shared with an individual user temporarily.
To break inheritance on a library: go to Library Settings > Permissions for this document library > Stop Inheriting Permissions. From there, you can add or remove permissions independently of the parent site.
Auditing and Reviewing Permissions
Over time, permissions become messy. Establish a regular review cadence — at minimum quarterly — to:
- Remove access for employees who have left the organization.
- Identify sites or libraries with broken inheritance.
- Review external sharing settings.
- Use the SharePoint Admin Center to run access reports.
Common Permissions Mistakes to Avoid
- Assigning permissions directly to individuals instead of groups — hard to maintain at scale.
- Over-permissioning by giving everyone Full Control — use least privilege.
- Breaking inheritance at the item level across hundreds of files — creates an unmanageable audit trail.
- Ignoring external sharing settings in the SharePoint Admin Center — a major security risk.
A well-governed permissions model is the foundation of a secure, trustworthy SharePoint environment.