Security Hardening
Within SharePoint
Secure collaboration without slowing down the business.
SharePoint is where teams store contracts, client files, HR documents, financial records, project work, policies, and the operational knowledge that keeps business moving. Security hardening makes sure that collaboration is protected by the right permissions, sharing controls, identity policies, document governance, and Microsoft 365 compliance settings.
6th Street Consulting helps organizations strengthen SharePoint within the Office 365 and Microsoft 365 environment. We review how your teams work today, identify where exposure can occur, and configure SharePoint, Microsoft Entra ID, Microsoft Purview, Conditional Access, DLP, retention, labels, and audit controls around real business requirements.
Why SharePoint security hardening matters in 2026
SharePoint now supports Teams file collaboration, OneDrive sharing, Power Automate workflows, intranets, extranets, document management, and AI-assisted discovery. A weak sharing policy or outdated permissions model can expose sensitive content across multiple Microsoft 365 experiences.
Permissions Drift
Access expands as teams change, projects close, and exceptions become normal.
External Sharing
Guests, links, domains, and expiration rules need governance that fits the risk.
Document Exposure
Sensitive content requires labels, retention, DLP, audit visibility, and lifecycle rules.
Identity Risk
MFA, Conditional Access, guest access, and device controls must work together.
6SC’s approach to SharePoint security hardening
Security hardening works best when it reflects the way the business actually collaborates. 6SC starts with your users, departments, content sensitivity, regulatory needs, partner workflows, and existing Microsoft 365 configuration. Then we build a practical security model that improves control without creating unnecessary friction.
Our work can include a SharePoint security assessment, permissions cleanup, Microsoft 365 governance model, external sharing review, document security configuration, Microsoft Purview implementation, and ongoing administrative support.
1. Discover the current security model
Review sites, libraries, owners, permission inheritance, sharing patterns, guest users, sensitive content, and governance gaps.
2. Design a permissions architecture
Align Microsoft 365 groups, Entra security groups, SharePoint groups, site ownership, and least-privilege access.
3. Harden the Office 365 controls
Configure sharing, DLP, labels, retention, audit, Conditional Access, MFA, sync restrictions, and document governance.
4. Document and govern long term
Create standards for site creation, owner review, external collaboration, sensitive data handling, and recurring access reviews.
Key areas to secure inside Microsoft 365
Microsoft provides guidance for SharePoint external sharing, sensitivity labels, Microsoft Purview DLP, and unmanaged device access controls. 6SC helps translate those controls into a practical business configuration.
Where is your SharePoint environment most exposed?
Click through common exposure areas. Each one is a practical starting point for a SharePoint security hardening engagement.
External users and sharing links
Review guest users, Anyone links, site-level sharing, external domains, access expiration, and Microsoft Entra B2B governance.
Permissions exceptions
Identify broken inheritance, direct access, stale groups, orphaned owners, and permission models that no longer reflect the business.
Sensitive document libraries
Classify content, apply labels, configure DLP, validate retention, and separate sensitive libraries from everyday collaboration.
Teams, OneDrive, and workflows
Review how Teams channels, OneDrive sharing, Power Apps, and Power Automate flows touch SharePoint content.
SharePoint document security and governance
Document security is more than folder permissions. A secure SharePoint strategy should define who can find content in search, who can share it, who can sync it, how long it should be retained, and what happens when a sensitive file leaves its intended workspace.
6SC helps organizations create governance for libraries, metadata, version history, retention, records, labels, site ownership, and administration. The result is a SharePoint environment that is easier to manage, easier to audit, and better aligned with business risk.
Related 6SC services
Connect SharePoint security to the rest of your Microsoft 365 strategy.
Secure your SharePoint environment with confidence.
Talk with 6SC about SharePoint hardening, Office 365 security governance, permissions architecture, document protection, external sharing controls, and Microsoft 365 compliance configuration.
SharePoint security hardening FAQ
What is SharePoint security hardening?
It is the process of improving SharePoint permissions, sharing, guest access, identity controls, document governance, DLP, labels, retention, audit logging, and security policies within Microsoft 365.
How do I secure SharePoint in Office 365?
Start with site inventory, owner validation, permissions cleanup, sharing controls, MFA, Conditional Access, sensitivity labels, DLP, retention, audit logging, and recurring governance reviews.
Should external sharing be turned off?
Not always. Many businesses need client, vendor, and partner collaboration. The better approach is to define which sites allow sharing, what link types are permitted, how guests authenticate, and when access expires.
Can 6SC help with an existing SharePoint environment?
Yes. 6SC can assess the current environment, clean up permissions, improve Microsoft 365 governance, configure security controls, and support ongoing SharePoint administration.