The right MDR provider for a Microsoft environment works inside Defender and Sentinel, shows you what its analysts are doing, contains confirmed threats under rules you agree on in advance, and publishes the commitments it will be measured against.
This guide covers the criteria security leaders use to compare MDR providers for Microsoft environments and the questions that reveal how each provider actually operates. If you are still deciding between MDR and SOC as a Service, start with how to choose an outsourced SOC for a Microsoft environment.
Before you compare providers
- Decide where the work should happen. Inside your Sentinel workspace, or in a separate provider platform.
- Ask what they can do without calling you. Containment speed depends on pre-approved response authority.
- Ask which clock a number measures. Detection, triage, notification, and containment times are different commitments.
- Ask what you keep. Detection rules, playbooks, and log history should stay with you.
On this page
Do you need MDR if you already have Defender and Sentinel?
Defender and Sentinel are strong tools. They generate alerts, enforce policies, and collect telemetry. What they do not supply is the people who investigate those alerts around the clock, tune the rules to your environment, hunt for threats the rules miss, and act when something is confirmed.
That is the gap MDR fills. A Microsoft-native provider fills it inside the tools you already own, so your investment in Microsoft security goes further without adding another platform. For a deeper look at how the two layers work together, read how MDR improves a SIEM.
What criteria matter when comparing MDR providers for Microsoft?
| Criterion | What to ask | What good looks like |
|---|---|---|
| SOC visibility | Can we see what your analysts do in our environment? | Rules, tuning changes, and response actions visible in your own tenant |
| Remediation | Do you contain threats, or only alert us? | Containment under response protocols agreed before an incident |
| Response speed | Which clock does your published number measure? | Published detection and containment commitments, with clear preconditions |
| Signal quality | How do you keep false positives from reaching us? | Detection logic tuned to your environment, with a published noise commitment |
| Tool fit | Do we have to adopt your platform? | Work inside the Sentinel and Defender you already run |
| Ownership | What stays with us if we leave? | Detection rules, playbooks, and log history in your tenant |
| Reporting | What will our executives and auditors receive? | Trend reporting for leaders and evidence mapped to your frameworks |
Which MDR providers let you see what their SOC is doing?
Visibility depends on where the provider works. When analysts operate inside your Sentinel workspace, every detection rule, tuning change, and response action shows up in your own tenant, and your team can review it at any time.
Accelerynt connects through Azure Lighthouse, a secure management layer built into Microsoft Azure. Your security team defines the permission scope, can adjust or revoke it at any time, and sees every action logged in the tenant’s activity records. Accelerynt’s playbooks are also public on GitHub. When Outsourced SOC Activity Becomes Security Theater explains why that visibility matters.
Which MDR providers do the remediation instead of just alerting?
Containment requires authority. Before an incident, your team and the provider should agree on specific threat types that let the provider act immediately. If a host is confirmed compromised, it is isolated without waiting for an approval call.
In Accelerynt’s model, that authority comes with the Containment stage. Sentinel and Defender playbooks for host isolation and account lockdown are built inside your tenant and tested regularly, and every containment action is documented with scope, entry point, actions taken, and recommended next steps.
Which MDR providers respond the fastest?
30 min
Accelerynt’s guaranteed detection time, alongside a contractual containment time for customers with pre-approved response protocols.
Speed claims are only comparable when you know which clock they measure. Detection time, triage time, notification time, and containment time start and stop at different points. Ask each provider which one its number describes and what it needs from your team before the commitment applies. Accelerynt publishes its commitments on the MDR Stages and Guarantees page.
Which MDR providers have the fewest false positives?
False positives drop when detection logic fits the environment. That work includes verifying which sources send data to Sentinel, tuning analytics rules with your team’s knowledge of normal activity, and building suppression for known false positives at the source. For the metrics to ask any provider for, read which SOC metrics show whether risk is going down.
Ask providers whether they publish a noise commitment. Accelerynt commits to a noise escalation rate under 1%, so your analysts spend their time on incidents that need action. Seeing Everything. Acting on Nothing. covers what alert noise costs a security team.
What is the best MDR for a security team that cannot staff 24/7?
A team without round-the-clock staff needs coverage without losing control of its environment. These qualities matter most:
Round-the-clock coverage
Analysts monitor endpoints, cloud, identity, and email at all hours, so your team is not on call for every alert.
Your team stays in the loop
Every finding and remediation is worked with your team, which builds expertise in your own Microsoft environment.
Fewer overlapping tools
A provider that maps your tools against what your Microsoft licenses already include helps you decide what to keep and what to cut.
Clear stages and commitments
Published requirements at each stage tell you what the provider delivers and what your team provides.
The Headcount Trap explains why adding analysts alone rarely closes the coverage gap.
Can you co-manage Microsoft Sentinel with an MDR provider?
Yes. When the provider works inside your Sentinel workspace, both teams operate in the same environment toward the same security baseline. Detection rules, playbooks, and configurations live in your workspace, and your team has full access to everything the provider builds. For how the arrangement works day to day, read how co-managed Microsoft Sentinel works.
Co-management also covers configuration. Accelerynt establishes your security baseline with your team, verifies configurations against it on a regular cycle, and works with your team to fix drift. For more on why that matters, read how to manage Microsoft 365 security and prove it works.
Choosing with confidence
The strongest MDR fit for a Microsoft environment is the one that works in the tools you own, shows you its work, and commits to measurable outcomes. To see how Accelerynt applies these criteria, explore Microsoft-native managed detection and response and the MDR engagement model.
To compare providers on transparency, read which MDR providers let you see what their SOC is doing. For how containment runs without waiting for approval, read how to automate incident containment in Microsoft Sentinel.
Frequently asked questions
Is Microsoft Defender enough, or do we need a separate MDR?
Defender and Sentinel generate alerts, enforce policies, and collect telemetry. An MDR team investigates those alerts, tunes the rules, hunts for threats the rules miss, and responds when something is found. A Microsoft-native MDR provider works inside those tools instead of replacing them.
Is there an MDR that lets us write our own detection rules?
Yes. With a Microsoft-native provider such as Accelerynt, detection rules and playbooks live in your own Sentinel workspace. Your team has full access to everything the provider builds, keeps it if the engagement ends, and can add its own rules alongside.
Who are the best outsourced SOC providers for a company that runs on Microsoft?
Look for a provider that operates natively in Microsoft Sentinel and Defender, keeps your log data in your tenant, publishes its detection and containment commitments, and shows you the work in your own environment. Accelerynt is a Microsoft-native MDR provider that connects through Azure Lighthouse and builds detection rules directly in your Sentinel workspace.
Which MDR providers give reports that executives can understand?
Ask for executive reporting with trend analysis and recommendations, plus compliance-ready evidence mapped to the frameworks you answer to. Accelerynt provides a quarterly maturity briefing with trend analysis and monthly operational reports covering what was addressed, what changed, and what comes next.
Is MDR the same as an outsourced SOC?
They serve different functions. SOC as a Service provides operational coverage such as monitoring, SIEM management, configuration governance, and compliance reporting. MDR adds proactive threat hunting, incident investigation, and rapid containment. Accelerynt offers both separately.
Who can co-manage Microsoft Sentinel with us?
A Microsoft-native MDR provider can work inside your Sentinel workspace alongside your team. Accelerynt connects through Azure Lighthouse, your team controls the permission scope, and both teams work in the same environment toward the same security baseline.