| Microsoft Sentinel, formerly Azure Sentinel, is Microsoft’s cloud-native security platform that helps businesses detect, investigate, and respond to cyber threats across their IT environments.
By bringing security data together and automating routine response tasks, it helps organizations spot threats sooner, reduce the burden on IT teams, and protect business operations. |
What Is Microsoft Sentinel? (You May Also Be Asking “What is Azure Sentinel?”)
Microsoft Sentinel combines several capabilities to support more effective security operations:
- Centralized security visibility: Connects security data from Microsoft 365, Azure, on-premises infrastructure, and third-party cloud environments to help identify threats that might otherwise go unnoticed.
- Intelligent threat detection: Uses SIEM capabilities, analytics, threat intelligence, and AI to connect suspicious events and uncover potential attacks.
- Automated incident response: Uses Security Orchestration, Automation, and Response (SOAR) capabilities to automate repetitive security tasks, helping IT teams focus on incidents that require human judgment.
- Integrated security operations: Works within the Microsoft Defender portal alongside Microsoft Defender XDR, bringing threat detection and investigation into a more connected security experience.
Why Canadian Businesses Might Need Microsoft Sentinel
Cyber threats don’t always leave obvious warning signs. A compromised account might trigger suspicious activity across devices and cloud applications, but when security information is scattered across disconnected systems, the bigger picture is easy to miss.
Microsoft Sentinel connects these signals, helping businesses uncover threats that individual security tools might overlook.
There’s also growing pressure to prove that cyber security investments are delivering results. Boards, insurers, and regulators want to know whether the business can identify threats and respond effectively, not simply whether security software is installed.
Microsoft Sentinel provides incident records and security reporting that help leaders understand what’s being monitored and where improvements are needed. That visibility supports stronger accountability, although it doesn’t guarantee compliance.
For Canadian healthcare providers, law firms, financial institutions, and manufacturers, the stakes are especially high. A security incident can compromise sensitive information or interrupt operations that customers depend on.
Organizations already using Microsoft 365 and Azure may benefit from Sentinel’s ability to monitor threats across their broader technology environment, including third-party and on-premises systems.
But does every business need Microsoft Sentinel? Not necessarily. Organizations with straightforward IT environments may already have sufficient protection through a properly configured and actively monitored Microsoft Defender XDR deployment.
Before adding another security platform, it’s worth understanding what your existing tools can detect, where visibility gaps remain, and whether the additional investment will meaningfully improve your ability to respond.
How Does Microsoft Sentinel Work?
Microsoft Sentinel works by collecting security data from across your IT environment and connecting the dots between suspicious activities.
Through advanced analytics and automation, it helps security teams move from reacting to individual alerts to understanding potential threats, investigating what happened, and taking action.
How Microsoft Sentinel Collects and Analyzes Security Data
Every sign-in, device alert, and cloud activity log tells part of a story. Microsoft Sentinel brings those pieces together using built-in data connectors, APIs, and Azure Monitor Agent integrations.
It collects security information from Microsoft 365, Azure, Microsoft Entra ID, and other connected systems, giving IT teams a more complete view of what’s happening across their environment.
But collecting data is only the beginning. Sentinel stores security information in Azure Monitor Log Analytics workspaces or the Microsoft Sentinel data lake, depending on how it will be used.
Its Advanced Security Information Model (ASIM) helps standardize different log formats, while Kusto Query Language (KQL) allows analysts to search for patterns and connect events that might otherwise seem unrelated.
Consider an unusual account sign-in followed by unexpected device activity and access to sensitive cloud resources. Individually, these events might not raise immediate concern. Together, they could point to a compromised account.
By connecting these signals, Microsoft Sentinel helps security teams recognize potential threats sooner and investigate them with greater context.
How Does Microsoft Sentinel Detect and Investigate Threats?
Spotting suspicious activity is one thing. Understanding whether it’s a real threat is another.
Microsoft Sentinel uses built-in and custom analytics rules, machine learning, and threat intelligence to identify potentially malicious behaviour. Its User and Entity Behavior Analytics (UEBA) capabilities help flag unusual activity, while related alerts can be grouped into incidents so analysts aren’t left investigating every warning in isolation.
When something suspicious happens, Sentinel helps security teams piece together the evidence. Analysts can trace activity across affected accounts and devices, using threat intelligence and KQL queries to understand how an incident developed. Automation rules and playbooks can also handle repetitive response tasks, giving teams more time to focus on decisions that require human judgment.
Not every threat triggers an obvious alert, which is why proactive investigation matters.
Microsoft Sentinel supports threat hunting, allowing security analysts to look for suspicious activity that existing detection rules may have missed. By mapping detection content to the MITRE ATT&CK framework, teams can better understand attacker techniques and identify gaps in their security monitoring.
Is Microsoft Sentinel the Right SIEM Solution for Your Organization?
Before investing in Microsoft Sentinel, it’s important to understand what your existing tools already cover, where security gaps remain, and whether the additional investment will make a meaningful difference to your business.
What Is the Difference Between Microsoft Sentinel and Microsoft Defender XDR?
Microsoft Sentinel and Microsoft Defender XDR both help businesses detect and respond to cyber threats, but they serve different purposes.
- Microsoft Defender XDR focuses on protecting supported endpoints, identities, email, and cloud applications.
- Microsoft Sentinel goes further, using SIEM and SOAR capabilities to connect security information across Microsoft products, third-party tools, and multicloud environments.
The real value comes from how these platforms work together. Through the Microsoft Defender portal, security teams can investigate threats across connected systems without constantly jumping between tools.
Defender XDR provides detailed threat detection and response, while Sentinel extends visibility to additional data sources and helps uncover suspicious activity that might otherwise go unnoticed.
But here’s the important question: Do you actually need both?
If your organization already uses Microsoft 365 E5, you may have substantial Defender XDR capabilities available. Adding Sentinel makes more sense when your existing tools can’t provide the visibility or investigation capabilities your business needs. The goal isn’t to collect more security tools. It’s to close the gaps that matter.
How Much Does Microsoft Sentinel Cost?
Microsoft Sentinel doesn’t come with a single fixed subscription price. Instead, costs depend largely on how much security data your organization collects and analyzes. Businesses can choose pay-as-you-go pricing or capacity commitment tiers starting at 100 GB per day, which can offer better value when daily data volumes are predictable.
Sentinel also includes 90 days of analytics-tier retention, while longer storage and additional Azure services can increase costs. The Microsoft Sentinel data lake offers a lower-cost option for storing historical security information.
Eligible Microsoft 365 E5 customers may also benefit from an allowance of up to 5 MB of qualifying data ingestion per user per day, helping reduce certain monitoring expenses.
Then there’s the cost that doesn’t always appear on a Microsoft invoice: the people and expertise required to manage it. Someone needs to configure detections, investigate incidents, and keep the platform running effectively. Cutting back on security logs might lower your monthly bill, but it can also create blind spots.
The smarter investment is one that balances cost with meaningful threat visibility and the ability to respond.
Microsoft Sentinel Cost Drivers
| Cost driver | What affects the cost | Category |
|---|---|---|
| Data ingestion | Daily log volume, data sources, and billing tier | Platform |
| Capacity commitments | Reserved daily ingestion volume and additional usage | Platform |
| Data retention | Storage beyond included retention periods | Platform |
| Data lake | Ingestion, processing, storage, and querying | Platform |
| Additional Azure services | Logic Apps, Azure Functions, and supporting services | Platform |
| Implementation | Connector setup, detection rules, integrations, and testing | Operational |
| Security monitoring | Internal security teams or managed monitoring services | Operational |
| Ongoing management | Incident investigation, threat hunting, detection tuning, and reporting | Operational |
Who Should Manage Microsoft Sentinel After Deployment
The real challenge is making sure someone is watching for threats, investigating suspicious activity, and taking action when it matters.
Can Internal IT Teams Manage Microsoft Sentinel Themselves?
Yes, internal IT teams can manage Microsoft Sentinel, but having the technical ability doesn’t always mean having the capacity. Running the platform effectively requires expertise in security analytics, KQL, and detection rule configuration.
It also means continuously fine-tuning alerts so your team can identify real threats without getting overwhelmed by false positives.
Security incidents need to be investigated, prioritized, and resolved, sometimes outside regular business hours. Microsoft recommends daily incident reviews and ongoing checks to make sure detections and data connections are working properly.
For IT teams already juggling everyday operations, maintaining that level of attention can quickly become difficult.
That’s where a managed Microsoft Sentinel approach may make sense. External security specialists can help fill expertise and monitoring gaps without requiring businesses to build an entire security operations centre (SOC). But even with outside support, internal leaders still need to own the decisions that affect their business.
What Does a Microsoft Sentinel Managed Service Include?
A Microsoft Sentinel managed service provides the expertise and ongoing support needed to keep your security monitoring effective. Instead of leaving your internal IT team responsible for every alert and configuration change, a managed provider helps maintain the platform, investigate suspicious activity, and improve threat detection over time.
| Service | What’s Included | Business Benefit |
|---|---|---|
| Platform Management | Maintaining data connectors, configurations, and platform health. | Reliable security visibility without adding to your IT team’s workload. |
| Security Monitoring | Monitoring alerts and identifying suspicious activity during agreed coverage hours. | Greater confidence that potential threats won’t go unnoticed. |
| Threat Detection and Tuning | Improving analytics rules and reducing false positives. | Fewer unnecessary alerts and more time focused on meaningful threats. |
| Incident Investigation | Analyzing suspicious events and escalating confirmed threats. | Faster understanding of incidents and clearer response priorities. |
| Incident Response | Supporting containment and remediation when included in the service agreement. | More coordinated action when security incidents occur. |
| Reporting and Optimization | Reviewing detection coverage, incident trends, and response performance. | Measurable insight into security effectiveness and opportunities for improvement. |
For businesses that want to retain control, a co-managed approach can offer the right balance. External security specialists take responsibility for agreed monitoring and investigation activities, while your internal IT team remains involved in decisions affecting business operations.
How to Evaluate a Managed Microsoft Sentinel Provider
Look for proven Microsoft security expertise, relevant credentials such as the Microsoft Certified: Security Operations Analyst Associate (SC-200), and experience connecting Sentinel with Microsoft Defender XDR and third-party systems. Ask how they’ll adapt detections to the threats that matter most to your business.
Pay close attention to what happens after an alert is triggered. Does the provider offer 24/7 monitoring, or does coverage end with the business day? Who determines whether an incident requires immediate action?
The answers should be reflected in clear service agreements with measurable expectations for response times and incident reporting. You should never have to guess who is responsible during a security incident.
Ultimately, the value of managed Microsoft Sentinel isn’t simply having someone maintain the software. It’s knowing your security operations are accountable, responsive, and delivering results you can measure.
Microsoft Sentinel Integrates with Microsoft’s Security and AI Ecosystem
Your security tools might be working exactly as they should, but are they working together?
Microsoft Sentinel helps close the gaps between disconnected systems by bringing security information into one place. Through its integration with Microsoft Defender XDR, security teams can investigate threats involving endpoints, identities, and cloud applications within the Microsoft Defender portal, rather than piecing together incidents across multiple tools.
This visibility extends across the Microsoft ecosystem. Microsoft Entra ID provides insight into suspicious sign-ins and potentially compromised accounts, while Microsoft 365 contributes security information from everyday business applications. Microsoft Defender for Cloud adds context around threats affecting cloud workloads.
Together, these connections help security teams understand how an incident might move through the business, although the visibility available depends on how each service is licensed and configured.
And because most businesses don’t operate entirely within Microsoft, Sentinel can also connect with AWS, Google Cloud, and on-premises infrastructure through supported data connectors and Azure monitoring services.
Newer capabilities, including the Sentinel data lake, security graph, and Model Context Protocol (MCP) integrations, expand how organizations can analyze and interact with security data. Some of these capabilities have additional licensing, availability, or configuration requirements.
Microsoft Security Copilot adds another layer, using AI to help analysts investigate suspicious activity and work through complex security information.
But AI-powered security still needs human oversight. Automated workflows can accelerate investigations and support faster responses, but decisions that could disrupt business operations shouldn’t be left unchecked.
| F12 Tip: Before investing in more security technology, consider whether you’re getting the full value from the Microsoft tools you already have. Connecting existing capabilities and closing visibility gaps may deliver more meaningful protection than adding another solution. |
How to Measure the Effectiveness of Microsoft Sentinel
| Metric | What to Measure | Business Value |
|---|---|---|
| Mean Time to Detect (MTTD) | Average time between threat activity and detection | Identify threats sooner |
| Mean Time to Respond (MTTR) | Time from a defined response start point to containment or resolution | Reduce the impact of incidents |
| Detection Coverage | Percentage of critical systems with validated monitoring | Reduce security blind spots |
| False-Positive Rate | Percentage of investigated alerts that aren’t genuine threats | Help IT teams focus on real risks |
| Incident Effectiveness | Investigation times and escalation performance | Improve response accountability |
| Automation Effectiveness | Successful automated workflows and estimated time saved | Reduce repetitive work |
| Data Ingestion Cost | Billable security data volume and cost by source | Improve budget visibility |
| Security Improvements | Outstanding detection gaps and remediation progress | Demonstrate progress in reducing exposure |
A good place to start is measuring how quickly your team identifies and responds to threats.
Mean time to detect (MTTD) helps show how long suspicious activity goes unnoticed, while mean time to respond (MTTR) tracks response performance using clearly defined measurement points. These metrics can reveal whether your security operations are becoming more effective or whether threats are still taking too long to address.
But speed doesn’t tell the whole story. If critical systems aren’t being monitored, faster responses won’t help with threats your team never sees. That’s why detection coverage matters just as much.
Microsoft Sentinel can help teams monitor data connector health and understand whether important security information is reaching the platform. Tracking false positives also reveals whether analysts are spending their time investigating real concerns or chasing alerts that lead nowhere.
For executives and boards, the conversation should go beyond technical dashboards. What matters is whether critical systems are monitored, serious threats are addressed within agreed timelines, and known security gaps are being closed.
Microsoft Sentinel can provide evidence to support those conversations, but meaningful results still depend on how well the platform is configured and how effectively people respond to its findings.
Is Your Business Ready for Microsoft Sentinel or Managed SIEM Services?
Do you need Microsoft Sentinel, or could you get more protection from the Microsoft security tools you already have? Before investing in another platform, it’s worth understanding where your security visibility falls short, which threats might go undetected, and who’s responsible for responding when something goes wrong.
A cybersecurity assessment can help uncover those gaps and identify where your investments will make the biggest difference.
Whether that means optimizing Microsoft Defender, implementing Microsoft Sentinel, or strengthening your internal IT team with co-managed security support, the right approach starts with understanding your business risks.
F12 brings Microsoft-first expertise and a practical, outcome-driven approach to help Canadian businesses make confident security decisions. We’ll help you identify what needs attention, prioritize your next steps, and focus your investment on protection you can measure.
Frequently Asked Questions About Azure Sentinel (Now Known as Microsoft Sentinel)
Is Microsoft Sentinel a SIEM or SOAR Platform?
Microsoft Sentinel is both a Security Information and Event Management (SIEM) platform and a Security Orchestration, Automation, and Response (SOAR) platform. Its SIEM capabilities bring security logs together, connect suspicious activity across systems, and help analysts investigate potential threats. Its SOAR capabilities use automation rules and playbooks to handle repetitive tasks, such as assigning incidents or triggering response workflows. Together, these capabilities help teams recognize threats sooner and spend less time managing alerts manually. Whether searching for “Microsoft Sentinel SIEM” or “Sentinel Microsoft,” the important distinction is that the platform combines threat detection with automated response while keeping people accountable for critical decisions.
Can Microsoft Sentinel Be Managed by a Third-Party Security Provider?
Yes. A third-party security provider can manage Microsoft Sentinel on your behalf, either fully or alongside your internal IT team. With managed Microsoft Azure Sentinel services, providers can monitor alerts, maintain data connections, improve detection rules, and investigate suspicious activity. Some also provide managed detection and response (MDR), including incident escalation and containment, depending on the service agreement. In a co-managed arrangement, external specialists handle agreed security operations while your internal team maintains control over business decisions. Before choosing a provider, clarify monitoring hours, response responsibilities, and reporting expectations. You should always know who’s accountable when a security incident occurs.
Can Microsoft Sentinel Support Canadian Compliance Requirements?
Yes. Microsoft Sentinel can support Canadian compliance efforts by centralizing security logs and maintaining records that help organizations investigate incidents and demonstrate security monitoring activities. For regulated businesses in healthcare and financial services, this visibility can make audits and incident reviews easier. The platform offers configurable data retention and access controls. However, organizations must ensure these settings align with applicable privacy requirements, including PIPEDA and provincial legislation. Microsoft Sentinel doesn’t automatically make your business compliant. Meeting regulatory obligations still requires appropriate safeguards, documented security processes, and clear accountability for protecting sensitive information.
