Cybersecurity

Microsoft 365 Collaboration Security

Multi-Site Organisation

The Challenge

Microsoft Teams and SharePoint were widely used for document sharing and communication. However, lack of structured governance meant excessive file sharing, uncontrolled permissions, and overlapping Teams channels.

The Approach

We implemented a comprehensive Microsoft 365 governance framework:

  • Teams Governance: Standardised templates with naming conventions and approval workflows
  • SharePoint Separation: Library organisation by department with role-based access controls
  • Data Classification: Sensitivity labels for confidential, internal, and public data
  • External Sharing Controls: Stricter guest access policies

The Solution

Secure, structured Microsoft 365 collaboration architecture developed. Teams channels aligned with business units while SharePoint libraries reflected departmental responsibilities.

Architecture

Teams Governance Layer

Standardised templates and lifecycle policies

SharePoint Document Layer

Department libraries with RBAC permissions

Classification Layer

Sensitivity labels enforcing encryption

Audit Layer

Central logging and alerts for compliance

Results

  • Eliminated uncontrolled sharing and shadow IT
  • Compliance with ISO 27001 Annex A.5.15 and A.5.12
  • Central reporting provided transparency for audits

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