Microsoft 365 security & data protection
Most of a modern company's email, files, chats and sign-ins live in Microsoft 365, so that is where attackers and accidental leaks happen. Our team configures the security layers around it: Microsoft Defender XDR for detection and response, Microsoft Purview for data loss prevention and sensitivity labels, and Microsoft Entra ID Protection for risky sign-ins.
What we do
- Defender XDR onboarding and incident queue tuning
- Risk-based Conditional Access with Entra ID Protection
- Sensitivity label taxonomy: labels, sublabels and publishing policies
- Auto-labeling and mandatory-labeling rollout
- DLP policies for email, files, Teams chat and endpoints, started in simulation mode
- Alert triage and tuning of DLP matches
- Defender and Entra signals exported to Microsoft Sentinel
- Reviews against the license each Microsoft 365 plan includes
Microsoft Defender XDR coordinates detection, investigation and response across endpoints, identities, email and cloud apps, and groups related alerts into one incident. Entra ID Protection scores sign-in and user risk and feeds Conditional Access, so a leaked password or a password spray triggers multifactor authentication or a password reset automatically. Its risk policies require Microsoft Entra ID P2 licensing.
Purview closes the data side. Sensitivity labels classify documents and emails and can encrypt them and mark them, and the label travels with the file. Data loss prevention policies watch Exchange, SharePoint, OneDrive, Teams and devices and warn, block or quarantine when sensitive data is shared. We roll policies out in simulation mode first, review the matches with the business, and only then enforce.
Leading platforms we work with
- Microsoft Defender XDR
- Microsoft Purview Data Loss Prevention
- Microsoft Purview sensitivity labels
- Microsoft Entra ID Protection
Platforms and practices
- Microsoft Defender for Endpoint
- Microsoft Defender for Office 365
- Microsoft Defender for Identity
- Microsoft Defender for Cloud Apps
- Conditional Access with risk-based policies
- DLP simulation mode and policy tips
- Automatic labeling of sensitive content
- Microsoft Sentinel integration
References
- Microsoft Learn: What is Microsoft Defender XDR?
- Microsoft Learn: Learn about data loss prevention (Microsoft Purview)
- Microsoft Learn: Learn about sensitivity labels
- Microsoft Learn: What is Microsoft Entra ID Protection?
- Microsoft Learn: Microsoft Defender for Office 365
Sources last checked .
Product names are trademarks of their owners and are listed to describe our experience; they do not imply endorsement or partnership.
How we use Microsoft 365 security & data protection for clients
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