Cloud platforms such as Microsoft 365 and Azure have become central to how many Australian businesses communicate, store information and run their day-to-day operations. But as more systems and data move to the cloud, keeping that environment secure becomes increasingly important. A compromised account, excessive permissions or an incorrect setting can expose sensitive information and disrupt business operations.
Cloud infrastructure security can seem complex, but understanding the fundamentals is the first step towards managing it effectively. At Ever Nimble, we help Australian SMBs secure and manage their Microsoft 365 and Azure environments. In this guide, we draw on that experience to explain the five key pillars, common security gaps and why ongoing management matters.
What is Cloud Infrastructure Security?
Cloud infrastructure security refers to the tools, policies and processes used to protect the systems, data and applications your business stores or runs in the cloud. This includes platforms such as Microsoft 365 and Microsoft Azure, along with the people and devices that access them.
In practice, it means ensuring the right people can access the right information, from secure devices and only when they need it. It also involves monitoring for suspicious activity, protecting sensitive data and maintaining secure backups so your business can recover if something goes wrong.
The Five Pillars of Cloud Security
Every business’s cloud environment is different, but the foundations of effective security remain the same. These five pillars reflect the areas we focus on when helping businesses assess their cloud security and strengthen their protection.
1. Identity and Access Management
Identity and access management controls who can access your cloud systems and what they are permitted to do. Businesses should:
- Require multi-factor authentication for all users and administrators.
- Use phishing-resistant sign-in methods, such as passkeys, where possible.
- Apply least privilege and role-based access control so people can only access the systems and information required for their role.
- Use Conditional Access policies to manage access based on factors such as identity, location, device and level of risk.
- Regularly review administrator accounts, user permissions and access granted to third-party applications.
- Disable outdated authentication methods that are easier to compromise.
2. Data Protection and Recovery
Sensitive business and customer data must be protected wherever it is stored, accessed or shared. Businesses should:
- Identify and classify sensitive information.
- Encrypt data when it is stored and transferred.
- Use data loss prevention (DLP) policies to reduce accidental or unauthorised sharing.
- Maintain secure backups that are separate from the main cloud environment.
- Regularly test that data can be restored successfully.
3. Network Security
Network security helps prevent unauthorised access to cloud resources and limits how easily an attacker can move between connected systems. Businesses should:
- Use secure remote-access solutions, such as Zero Trust Network Access (ZTNA), to verify users and devices and limit access to the specific systems they need.
- Separate critical systems from less sensitive parts of the environment.
- Review firewall and routing rules across cloud and hybrid environments.
- Remove unnecessary public access to cloud resources.
4. Workload and Endpoint Security
Every device, server, application and cloud workload can introduce risk if it is not properly secured. Businesses should:
- Keep operating systems, applications and devices patched and up to date.
- Use Endpoint Detection and Response (EDR) tools to identify suspicious activity.
- Apply consistent security configurations across devices, servers and cloud workloads.
- Regularly scan for vulnerabilities and publicly exposed resources.
5. Monitoring and Incident Response
Cloud security requires ongoing oversight, not just a secure initial setup. Businesses should:
- Collect and monitor security logs from cloud platforms, devices and networks.
- Configure alerts for unusual or suspicious activity.
- Establish clear steps for responding to a security incident.
- Define who needs to be involved and when an issue should be escalated.
- Regularly test the incident response plan.
For Microsoft 365 environments, Microsoft 365 security reporting can provide greater visibility into user activity, permissions, external sharing and failed sign-in attempts.
Common Cloud Security Misconfigurations in Microsoft 365 and Azure
Even when the right security tools are available, incorrect or inconsistent configurations can leave gaps in your cloud environment. Through our Microsoft 365 and Azure security reviews and ongoing client support, these are some of the most common misconfigurations we encounter.
Microsoft 365 Misconfigurations
- Weak or outdated authentication settings: Relying only on SMS-based MFA or leaving legacy authentication enabled can make accounts easier to compromise.
- Excessive administrator access: Users may have Global Admin, SharePoint Admin or Exchange Admin permissions beyond what their roles require.
- Incomplete Conditional Access coverage: Policies may not cover all employees, administrators, guest accounts or high-risk sign-ins.
- Uncontrolled external sharing: SharePoint and OneDrive may allow “anyone with the link” sharing, increasing the risk of sensitive information being exposed.
- Unreviewed application permissions: Third-party applications connected to Microsoft 365 may retain access to emails, files and other business data after that access is no longer needed.
Azure Misconfigurations
- Publicly exposed resources: Azure resources may be assigned public IP addresses unnecessarily or protected by overly permissive Network Security Group rules.
- Inconsistent network and security controls: Flat networks and a lack of standardised policies can make it easier for attackers to move between connected systems and result in resources being created with inadequate protection.
Hybrid Identity Misconfigurations
- Outdated accounts and security exceptions: Inactive on-premises accounts may remain connected to the cloud, while service accounts or older applications may continue to be exempt from important security control.
Backup and Recovery Misconfigurations
- Unprotected or untested backups: Backups may remain accessible from the main environment or go untested, leaving the business uncertain whether its systems and data can be recovered after an incident.
Why Does Cloud Security Require Ongoing Management?
Cloud environments continually change. Employees join, leave or move into different roles, new applications are connected and temporary exceptions can become permanent security gaps. Cyber threats also evolve, which means security controls must be regularly reviewed, tested and improved.
At Ever Nimble, our ongoing cloud security support includes:
- 24/7 monitoring and response: Security Operations Centre monitoring and Managed Detection and Response services combine security technology with human expertise to investigate suspicious activity and help contain genuine threats.
- Vulnerability management: Regular scanning and assessment identify exposed systems, vulnerabilities and misconfigurations, then prioritise them for remediation.
- Security reviews: Periodic reviews can uncover outdated permissions, inactive accounts, risky third-party applications and policies that are no longer effective.
- Incident response planning: Documented plans and practice exercises help your team understand who is responsible, how an incident should be escalated and what needs to happen first.
For businesses using Microsoft 365 and Azure, ongoing support provides greater visibility and helps keep security controls aligned with changes to your workforce, technology and risks.
Can Ever Nimble Help Strengthen Cloud Security?
If you’re unsure whether your Microsoft 365 or Azure environment is properly protected, our cloud and cyber security experts can assess your current setup, identify potential gaps and recommend practical improvements based on your business needs.
Get in touch to discuss how Ever Nimble can help you build and maintain a more secure cloud environment.
FAQs
What Are the Biggest Cloud Security Risks for Small Businesses?
Common risks include compromised accounts, excessive user permissions, cloud misconfigurations, insecure third-party applications, exposed data, unpatched devices and inadequate backups. These gaps can lead to data breaches, financial loss and disruption to business operations.
How Can You Tell if Your Cloud Environment Is Secure?
The most effective way to understand your cloud security is through a comprehensive assessment. This can uncover configuration gaps, excessive permissions, exposed resources, inactive accounts and other vulnerabilities. An experienced IT provider can assess your environment, explain the findings and help you prioritise the improvements that will reduce risk.
How Can Businesses Improve Microsoft 365 and Azure Security?
Start by requiring MFA, protecting administrator accounts and applying least privilege. Businesses should also review Conditional Access policies, restrict external sharing, check third-party application permissions, secure devices and Azure resources, monitor suspicious activity and test backups. Work with a trusted technology partner if you need support assessing your environment, prioritising improvements and managing security over time.
Who Is Responsible for Security in the Cloud?
Cloud security is a shared responsibility between the cloud provider and the customer. Microsoft protects the underlying infrastructure and services it operates, while your business remains responsible for areas such as user access, security configurations, connected devices, applications and data. The exact division of responsibility depends on the cloud services you use.
How Often Should Cloud Security Be Reviewed?
Cloud environments should be monitored continuously and formally reviewed at regular intervals. Additional reviews should take place after significant changes, such as introducing a new application, changing employee access, expanding your cloud environment or responding to a security incident.