The IT admin’s guide to successful Microsoft 365 compliance

For the average user, Microsoft 365 is a flexible hub for collaboration, file sharing, and communication. But for IT admins, that same freedom introduces a range of compliance risks. Staying compliant in M365 means aligning with frameworks like HIPAA, GDPR, and ISO—without disrupting how people work.

Compliance isn’t a one-and-done task. Even with policies in place, compliance risks need constant attention. This guide to Microsoft 365 compliance breaks it all down, with clear strategies and tools to help you manage risk while keeping productivity high.

Why Microsoft 365 compliance matters 

When managed well, Microsoft 365 compliance keeps your environment secure and efficient without slowing down collaboration. But when it’s not, permissions sprawl, data gets overshared, and risk creeps in fast.

Strong IT compliance security starts with understanding where your controls live. Microsoft’s compliance tools are primarily consolidated in the Microsoft Purview portal, with some controls managed across Entra ID and other admin centers

Key modules include:

• Compliance Manager: Assess and manage risk-based compliance with improvement actions, regulatory templates, and a compliance score that helps you track progress over time. 
• eDiscovery: Support legal and HR investigations with case-based workflows. Create cases, place holds, and collect data across Microsoft Teams, SharePoint, OneDrive, and Exchange. Then review and export content as needed.
• Records management: Use retention labels to manage retention at the item level. When required, declare items as records or regulatory records to meet formal records management obligations.
• Insider risk management: Identify and investigate risky user behavior, such as data exfiltration or policy violations.
• Data lifecycle management: Create retention policies that retain what you need and delete what you don’t to reduce compliance risk and liability across Exchange, SharePoint, OneDrive, Teams, and other M365 services. 
• Audit logs: Search and export user and admin activity logs for investigation and audit support.

While the Microsoft Purview portal gives you the framework and controls for compliance security, staying compliant still requires ongoing attention. Without regular monitoring, even small configuration gaps can quickly turn into widespread exposure. 

ShareGate Protect helps you see and act on governance risks—like oversharing and guest access—with in-context remediation and bulk actions. Instead of jumping between admin centers, you can right-size permissions, clean up inactive access, and reduce sprawl from one central location.

Managing app and integration risk in Microsoft 365

Data protection isn’t just about files and permissions. Every third-party app connected to Microsoft 365 introduces another potential access path to your data.

For IT admins, the real question isn’t how the app gets certified. It’s this: What does this app have access to in my tenant—and how do I control it?

Even well-intentioned integrations can create oversharing risks if they’re granted excessive permissions or left unmonitored. So start with visibility. Review enterprise applications and API permissions in Microsoft Entra ID, paying close attention to:

• Apps with broad Graph or SharePoint permissions
• Delegated versus application permissions
• Guest and external app access
• Unused or legacy integrations

Then, layer in M365's built-in compliance controls:

• Data loss prevention (DLP): Monitor and control the sharing or movement of sensitive information based on defined policies.
• Retention and records policies: Use automated retention policies to keep what’s needed and delete files aging past their retention date.
• Sensitivity labeling and encryption: Classify and protect files with sensitivity labels, allowing only authorized users to access your data.
• Audit logs and monitoring: Track a wide range of user and admin activities (coverage varies by workload and licensing).
• Litigation hold: Use eDiscovery to create cases, place content on hold, and preserve data for legal or regulatory needs.
• Insider risk and communication compliance: Catch risky behavior before it escalates with continual monitoring.

Third-party integrations add another layer of complexity to compliance, but that doesn’t have to mean more hassle. With a tool like ShareGate Protect, you can continuously monitor permissions, guest access, and workspace sprawl, making iterative improvements a breeze.

How to build a strategy for compliance in Microsoft 365

Building out a successful Microsoft 365 compliance strategy is about finding ways to meet your goals without manual effort spiraling out of control. Even in well-oiled environments, you’re likely to run into challenges like:

• Conflicting policies
• Over-permissioned guest accounts
• Legacy configurations not transferring post-migration
• New regulations requiring policy changes

Here’s a framework to mitigate common problems and make Microsoft 365 compliance as straightforward as possible. 

Audit and data classification

It’s hard to enforce compliance rules if you don’t understand what you’re working with. Start by auditing your existing content, organizing it, and applying the right policies. That includes sensitivity labels, setting retention rules, and flagging high-risk content that needs extra oversight. Once data is classified (labels/retention), you can use ShareGate Protect to surface governance drift—like oversharing, risky external access, inactive guests, and workspace sprawl—based on tenant/workspace metadata.

Define roles and governance structure

Strong and precise authorization structures are the foundation of a good compliance policy. Permissions actively dictate who can manage policies, approve guest access, or change the access policies for files. You can use the principle of least privilege here to prevent needless sprawl.

Configure policies and automate workflows

Microsoft Purview can boost your visibility and even automate a few core access or data retention policies. Where possible, leverage these tools to cut back on manual admin tasks. If you want to take automation to the next level, consider ShareGate Protect’s bulk actions and in-context remediation (for example, addressing risky guest access) to speed up governance cleanup across Teams/SharePoint.

Review and monitor compliance status

Compliance is an ongoing effort that requires regular checkups, self-audits, and guest user management. Frequently checking in on your regulator updates allows you to tackle risks before they escalate. 

Bonus tip: Keep a regulatory database handy to quickly double-check what each mandate requires.

Train users for awareness and accountability

While you have the final say in all things compliance, you’ll likely entrust group owners with some of that responsibility. To bring other individuals up to speed, offer training so everyone understands how to manage Microsoft 365 and what policies they need to follow.

How ShareGate reinforces Microsoft 365 compliance

Microsoft Purview provides security and compliance controls, but in large tenants managing governance (permissions drift, external sharing hygiene, sprawl) can still involve significant manual work across multiple admin centers.

ShareGate Protect strengthens your Microsoft 365 governance strategy by giving you clear visibility across your entire tenant. Instead of piecing together reports from multiple admin centers, you can quickly surface oversharing, risky external access, workspace sprawl, and permissions drift in one place. 

With a unified dashboard and in-context remediation, you can spot governance risks early and take action fast-—before they turn into compliance issues. 

Take control of Microsoft 365 compliance and get ready for Copilot—request a ShareGate demo today.