Gartner Research

Understanding and Implementing Security in Office 365: Exchange Online, SharePoint Online, OneDrive for Business and Teams


Organizations have security concerns as they are planning or rolling out Office 365. To help technical professionals select the right mix of Microsoft and third-party controls, this report assesses Office 365’s security capabilities for email and collaboration.

Published: 31 January 2019

ID: G00349107

Analyst(s): Patrick Hevesi

Table Of Contents


  • Basic Security
    • Exchange Online Protection
    • SharePoint/OneDrive Anti-Malware (Updated)
  • Advanced Security
    • Advanced Threat Protection (UPDATED)
    • Windows Defender Advanced Threat Protection (Updated)
    • Office 365 Cloud App Security (Updated)
    • Microsoft Cloud App Security (Updated)
    • Threat Intelligence (Updated)
  • Identity and Access Management
    • Multi-Factor Authentication
    • Administrator Roles Required for Security
    • Conditional Access
    • Advanced Threat Analytics
    • Azure Advanced Threat Protection
    • Azure AD Identity Protection
    • Azure AD Privileged Identity Management
    • Privileged Access Management (NEW)
  • Intune
    • Risk-Based Conditional Access
    • Intune APIs and Microsoft Graph (NEW)
  • Encryption (Updated)
    • S/MIME Encryption
    • Azure Information Protection for Office 365
    • Office 365 Message Encryption (Updated)
    • Customer Key (NEW)
  • Data Protection
    • Azure Information Protection
    • Data Loss Prevention in Security & Compliance Center
    • Advanced Data Loss Prevention in MCAS
    • Advanced Data Governance
  • Network Access
    • Tenant Restrictions
  • Microsoft Clients
    • Office
    • Outlook
    • OneDrive for Business
  • Office 365 Security Management
    • Administration Consoles
    • Office 365 Management Activity API
    • Microsoft Secure Score (Updated)
  • Audit and Logging
    • Office 365 Audit Log Search (NEW)
    • Customer Lockbox
  • PowerShell Security and Management (NEW)
  • Strengths
  • Weaknesses


  • Leverage MFA, Azure AD PIM and Azure AD Identity Protection for Administrators and Other High-Privilege Users
  • Deploy OCAS, MCAS or a Third-Party CASB for Added Visibility and Security in Off-Premises and BYOD Scenarios
  • Evaluate AIP, CAS or Third-Party DLP Solutions to Fill the Enterprise-Feature Gaps in SharePoint and OneDrive for Business
  • Deploy ATP’s Sandboxing and URL-Scanning Capabilities
    • Advanced eDiscovery
  • Consider BYOK or HYOK for AIP With SharePoint Online and OneDrive for Business, If Required for Compliance
  • Do Not Consider Azure ExpressRoute for Office 365 as a Security Control
  • Augment Office 365 Security With Third-Party Security Solutions to Close Current Gaps

The Details

  • Microsoft Data Center and Application Security

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