CRITICALSTART® MDR for Microsoft Security

Achieve the greatest risk reduction per dollar invested with unified Managed Detection and Response (MDR) services for Microsoft Defender XDR, Defender for Endpoint, Defender for Servers, Defender for Cloud, and Sentinel 

Feb 2024 Version

Key Benefits

Gain comprehensive threat detection and response coverage for the Microsoft Security suite. 


Reduce your risk acceptance, as we resolve every alert. 

Extend your team with Microsoft security expertise, 24x7x365. 


Speed up investigation and response and consolidate visibility in one portal. 


Reduce attacker dwell time with 60-minute or less Time to Detect (TTD) and Median Time to Resolution (MTTR) SLAs.

Accelerate value from your Microsoft security tools. 

The Critical Start Difference

  • We do what others don’t. 
    Critical Start provides deep integration with the Microsoft security suite to detect every event, resolve every alert, and respond to breaches. We reduce risk acceptance and magnify security visibility by leveraging the deep cybersecurity insights and capabilities that make the Microsoft security stack different from other Extended Detection and Response (XDR) solutions. 

  • We resolve every alert, regardless of criticality.
    MDR services leverage the Cyber Operations Risk & Response™ platform to collect, understand, and resolve incidents across the Microsoft environment. Our platform enriches every alert with additional metadata from the Microsoft environment. Our service also features our Trusted Behavior Registry® (TBR®), the largest registry of known-good alerts (false positives), delivering the scalability to resolve every alert. 

  • Seamless integration.   
    Our services integrate with, leverage, and optimize Microsoft security solutions for enhanced threat detection and response outcomes. Integration with the Microsoft security suite is engineered to enforce secure access. We only request the minimum level of permissions needed, and we never ask for highly privileged roles such as Global Administrator.    

  • Leverage the resources you already have.  
    Extend your team with highly skilled Microsoft Security experts for 24x7x365 threat detection and response coverage backed by contractual Service Level Agreements (SLAs) for a 60-minute or less Time to Detect (TTD) and Median Time to Resolution (MTTR). Several security analysts are also Microsoft Certified as Security Operations Analyst Associates

How we do it

Managed Detection and Response Services for Microsoft Defender XDR

Critical Start MDR services for Microsoft Defender XDR leverage: 

  • Queries within the Cyber Operations Risk & Response™ platform to pull in additional data from multiple Microsoft consoles into one single pane of glass.  
  • Microsoft User and Entity Behavior Analytics (UEBA) increases the likelihood of detecting a true positive at multiple parts of the kill chain.
  • Microsoft Entra Identity Protection as an identity provider, single sign-on, and user provisioning management
  • Manage and maintain Indicators of Compromise (IOCs) published by Microsoft on an hourly basis to improve detection performance

Managed Detection and Response Services for Microsoft Defender for Endpoint

Critical Start has a deep integration with Microsoft Defender for Endpoint that enables us to analyze every alert by matching it against our platform to provide unmatched transparency and automated security and control. Our service is built on comprehensive insights into operating system threats and shared signals across devices, identities, and information to identify and contain compromised accounts. These features, combined with 24x7x265 monitoring by a team of highly skilled analysts in SOC 2 Type 2 certified centers, reduce attack dwell time to further protect your business. 

MDR Services for Microsoft Defender for Servers

Managing security in rapidly changing server environments, with evolving configurations and dynamic workloads, can be challenging. Critical Start Managed Detection and Response (MDR) services for Microsoft Defender for Servers are essential in todays threat landscape, as they adapt to the dynamic nature of server environments, providing continuous protection and ensuring security remains up-to-date with the latest changes. Our services dynamically adjust to the evolving server configurations and workloads, ensuring that your servers are always protected against emerging threats and that costs are optimized. Critical Start MDR services for Microsoft Defender for Servers allow you to: 

  • Streamline the deployment process, ensuring consistent, reliable protection across all servers 
  • Ensure optimal security for business-critical resources with customized responses based on server criticality 
  • Identify and mitigate threats quickly with a guaranteed 10-minute notification for Critical alerts and 60-minute or less Median Time to Resolution (MTTR) for ALL alerts, regardless of priority

Managed Detection and Response Services for Microsoft Sentinel

Critical Start MDR services integrate with Microsoft Sentinel to detect every event, resolve every alert, and escalate only the alerts that matter to you. In our MDR service, we:

  • Investigate and resolve all security alerts generated by Microsoft Sentinel.  
  • Manage, maintain, and curate Sentinel out-of-box detections and IOCs.
  • Ingest all source data across all users, devices, applications, and infrastructures for investigation and automatic resolution of what is known-good (false positives). 

Managed SIEM Services for Microsoft Sentinel

Critical Start Managed SIEM services for Microsoft Sentinel simplifies the architecture and deployment of SIEM, while reducing overall costs. We take responsibility for the back-end components and maintenance of your SIEM application, including version updates and application performance, so you can focus on other priorities, increasing the efficiency of your business. Key outcomes:

  • Improve cost efficiency and optimize value with better resource allocation
  • Increased productivity and operational performance by increasing team effectiveness
  • Enhance detection coverage capabilities and security and compliance posture by closing security gaps


Take threat detection and response on-the-go with the MobileSOC application. An industry-leading first, MobileSOC puts the strength of our platform in your hands, giving you the ability to triage and contain breaches right from your phone.   

We’re ready to help!

Microsoft Security is good—really good. But we can help you make it better. Our risk-based, trust-oriented approach to MDR combined with all that the Microsoft Security Suite has to offer, provides the power to resolve alerts and stop threats cold. Just let us know how we can help you make the most of everything Microsoft has to offer.

Benchmark your cybersecurity against peers with our Free Quick Start Risk Assessments tool!
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