Securing the Cloud: How MSI’s Cloud Infrastructure and Microsoft 365 Configuration Reviews Reduce Risk and Strengthen Security

Posted on February 12, 2025 by Brent Huston

Cloud platforms like AWS, Azure, and Google Cloud, alongside Microsoft 365 (M365), have become the backbone of modern business operations. While these tools offer unparalleled scalability and collaboration, they also introduce unique security challenges. Misconfigurations, weak security settings, and overlooked compliance gaps can expose sensitive data, disrupt operations, and attract attackers.

This growing complexity demands more than traditional security approaches. That’s where MSI’s Cloud and M365 Configuration Review Services come in—helping organizations identify vulnerabilities, ensure compliance, and build stronger, more resilient cloud environments.

Section 1: The Cloud Security and M365 Challenge

Common Cloud Misconfigurations

Cloud platforms offer powerful features, but misconfigurations are among the most common and dangerous risks. These missteps are often caused by default settings or poor understanding of cloud security best practices. Common issues include:

Open S3 Buckets: Exposing sensitive data to the public internet.
Overly Permissive IAM Roles: Allowing more access than necessary.
Exposed Databases: Poorly secured database instances with weak authentication.
Misconfigured Virtual Networks: Creating unintentional pathways for attackers.

M365-Specific Risks

Microsoft 365 has become a business staple, but its broad adoption also makes it a high-value target for cyberattacks. Security challenges in M365 environments include:

Weak Security Settings: Particularly in Exchange Online, SharePoint, and OneDrive.
Email Security Gaps: Misconfigured SPF, DKIM, and DMARC policies, leaving organizations vulnerable to phishing and spoofing attacks.
Overlooked Audit Logs: Missing critical insights from Teams, Power Automate, and third-party integrations.

Compliance and Governance Gaps

Cloud services and M365 present significant governance challenges. Many organizations struggle to align with security benchmarks like CIS, NIST, or regulatory requirements such as GDPR, HIPAA, and PCI-DSS. Failure to meet these standards can result in hefty fines and damaging data breaches.

Section 2: MSI’s Value Proposition

Cloud Infrastructure Configuration Review

MSI’s Cloud Configuration Review Service covers AWS, Azure, and Google Cloud environments to detect and remediate security gaps. Key elements include:

Comprehensive Cloud Assessments: Identifying security misconfigurations across compute, storage, and network services.
Database and Storage Security: Ensuring encryption, proper access controls, and minimal exposure.
Virtual Network Configurations: Implementing segmentation, secure routing, and least privilege network policies.

Microsoft 365 Security Review

MSI’s M365 Security Review takes a deep dive into your configurations to strengthen security and compliance. The process includes:

Exchange Online Review: Focus on mailbox permissions, phishing protection, and external email forwarding rules.
OneDrive & SharePoint: Evaluate sharing settings, access policies, and data governance.
Teams Security: Assess external access, retention policies, and file-sharing risks.

Identity and Access Management

Azure Active Directory (AAD) configurations are critical to security posture. MSI’s review ensures that Conditional Access Policies and Multi-Factor Authentication (MFA) are properly configured to reduce risk.

Data Loss Prevention & Compliance

Our team evaluates Data Loss Prevention (DLP) policies, ensuring they align with industry frameworks and protect sensitive data from accidental exposure.

Section 3: Reducing Risk and Ensuring Compliance

Cloud Security Framework Alignment

MSI helps organizations align with cloud security frameworks such as NIST, CIS Benchmarks, and Microsoft Secure Score to maintain a strong security posture.

Regulatory Compliance Made Easier

We tailor our recommendations to ensure compliance with regulatory standards, whether it’s HIPAA, GDPR, or PCI-DSS.

Threat Intelligence Integration

We help you leverage Microsoft’s built-in security tools, including:

Microsoft Defender for Office 365
Azure Security Center
Microsoft Cloud App Security (MCAS)

Section 4: Actionable Recommendations from MSI

Here are some practical steps we recommend during our reviews:

For Cloud Platforms

Secure cloud-native services with robust encryption and key management.
Enforce Role-Based Access Controls (RBAC).
Implement Network Segmentation to isolate sensitive resources.

For Microsoft 365

Harden email flow with SPF, DKIM, and DMARC configurations.
Optimize and continuously monitor your Microsoft Secure Score.
Deploy Advanced Threat Protection (ATP) and Conditional Access Policies for proactive defense.
Establish logging and alerting for suspicious activities in Azure AD.

Zero Trust Architecture

MSI integrates Zero Trust principles across cloud and M365 environments to minimize exposure and enforce strict access controls.

Section 5: The Risk Reduction Impact

Reduced Attack Surface

Configuration reviews significantly reduce your organization’s exposure to attacks by closing common security gaps.

Improved Incident Response Readiness

With proactive monitoring and hardening, your security team can detect and respond to incidents faster, minimizing damage.

Enhanced Operational Efficiency

By avoiding costly security incidents and achieving compliance, organizations can focus on innovation rather than constant firefighting.

Conclusion: Why Choose MSI for Cloud and M365 Security?

MSI’s proven expertise in cloud and Microsoft 365 security helps organizations reduce risk, achieve compliance, and improve operational resilience. With tailored reviews and actionable recommendations, we empower your team to stay secure in an increasingly complex digital landscape.

Contact us today to schedule a Cloud & Microsoft 365 Security Configuration Review and take the first step toward a stronger, more secure environment.

* AI tools were used as a research assistant for this content.

Cloudy With a Chance of Misconfigurations

Posted on April 27, 2018 by Adam Hostetler

Many organizations have embraced cloud platforms now, like Amazon AWS or Microsoft Azure, whether they are using it for just a few services or moved part or all of their infrastructure there. No matter the service though, configuration isn’t foolproof and they all require specific knowledge to configure in a secure way.

In some cases we have seen these services configured in a way that isn’t best practice, which led to exposure of sensitive information, or compromises through services that should not have been exposed. In many instances there are at least some areas that can be hardened, or features enabled, to reduce risk and improve monitoring capabilities.

So, what should you be doing? We’ll take a look at Amazon AWS today, and some of the top issues.

One issue, that is seemingly pervasive, is inappropriate permissions on S3 buckets. Searches on S3 incidents will turn up numerous stories about companies exposing sensitive data due to improper configuration. How can you prevent that?

Firstly, when creating your buckets, consider your permissions very carefully. If you want to publicly share data from a bucket, consider granting ‘Everyone’ read permissions to the specific resources, instead of the entire bucket. Never allow the ‘Everyone’ group to have write permissions, on the bucket, or on individual resources. The ‘Everyone’ group applies literally to everyone, your employees and any attackers alike.

Secondly, take advantage of the logging capability of S3, and monitor the logs. This will help identify any inappropriately accessed resources, whether through inadvertently exposed buckets, or through misuse of authorization internally.

Another common issue is ports unnecessarily exposed on EC2 resources. This happens through misconfigurations in VPC NACLs or Security Groups, which act as a firewall, sometimes found configured with inbound traffic allowed to any port from any ip. NACLs and Security Groups should be configured to allow the least amount of traffic to the destination as possible, restricting by port and by ip. Don’t forget about restricting outbound traffic as well. For example, your database server probably only needs to talk to the web server and system update servers.

The last issue we’ll discuss today is the IAM, the Identity and Access Management interface. Firstly, you should be using IAM to configure users and access, instead of sharing the root account among everyone. Secondly, make sure IAM users and keys are configured correctly, with the least amount of privileges necessary for that particularly user. I also recommend requiring multifactor authentication, particularly on the root account, any users in the PowerUsers or Admins group, or any groups you have with similar permissions.

That’s all for today. And remember, the good news here is that you can configure these systems and services to be as secure as what is sitting on your local network.