Ten layers of protection for Microsoft 365 and endpoints
Our own security service, developed for Irish businesses that run on Microsoft 365. Built to stop ransomware and help you recover fast.
Microsoft 365 isn't secure just because it's Microsoft
Many Irish businesses assume their Microsoft 365 tenant is locked down. In practice, misconfigured permissions, open guest access and over-shared data can leave you exposed even when you believe you're protected.
Cloud Shield 365 is our all-in-one answer for Microsoft 365 and Azure. It brings the protection, monitoring and response together in one managed service.
What you get
- Advanced threat protection across Microsoft 365, Azure and endpoints
- Real-time monitoring backed by our 24/7 team
- Automated incident response to contain threats quickly
- Identity, access and data security built for hybrid work
- Scalable protection that grows with your organisation
Where Microsoft 365 security usually falls short
Our security audits across Irish organisations keep finding the same weak spots. These are the areas we close.
Silent misconfigurations
Settings that quietly expose data without anyone noticing.
Too much access
Least-privilege access, so people only reach what their role needs.
MFA, DLP and endpoints
Stronger multi-factor authentication, data loss prevention and endpoint protection.
Shadow IT and third-party apps
Visibility and control over the apps and services connected to your tenant.
Slow, manual response
Automated response using Microsoft Sentinel and Defender.
Security awareness
Making good security habits part of everyday work across the organisation.
The same protection behind compliance and AI
Cloud Shield 365 doesn't stop at threat protection. It underpins our other services too.
Security
Part of our wider cyber security service, alongside 24/7 SOC monitoring and incident response.
Compliance
Our compliance service is monitored by Cloud Shield 365, so your controls stay in place between audits.
AI & Copilot
Guardrails for identity, monitoring and compliance reporting when you roll out Copilot and other AI tools.
Find out where your tenant stands
We start with a clear picture of your Microsoft 365 setup, then agree a plan with you.
Free health check
We review your current setup and tell you what's working and what's at risk.
Custom roadmap
A clear plan with prioritised next steps, agreed with you.
Onboarding
We switch on protection with minimal disruption to your people.
What Cloud Shield 365 is, in plain English
Cloud Shield 365 is Nostra's own managed security service: ten layers of protection for Microsoft 365, Azure and endpoints, developed for Irish businesses that run on Microsoft 365. It brings threat protection, real-time monitoring by our 24/7 team and automated incident response together in one managed service, built to stop ransomware and help you recover fast.
Why Microsoft 365 isn't secure by default
Many businesses assume their tenant is locked down. In practice, our security audits across Irish organisations keep finding the same weak spots: silent misconfigurations that quietly expose data, too much access, weak multi-factor authentication and data loss prevention, unmanaged third-party apps, and slow manual response. Cloud Shield 365 closes those gaps — least-privilege access, stronger MFA, DLP and endpoint protection, visibility over connected apps, and automated response using Microsoft Sentinel and Defender.
One shield behind everything
Cloud Shield 365 underpins our other services too: it's part of our wider cyber security service alongside 24/7 SOC monitoring, it keeps compliance controls in place between audits, and it provides the guardrails for Copilot and AI rollouts.
Getting started
A free health check gives you a clear picture of your Microsoft 365 setup — what's working and what's at risk — followed by a prioritised roadmap agreed with you, then onboarding with minimal disruption.
Cloud Shield 365 questions
What is Cloud Shield 365?
Nostra's own managed security service: ten layers of protection for Microsoft 365, Azure and endpoints, combining advanced threat protection, real-time monitoring by a 24/7 team and automated incident response in one service.
Isn't Microsoft 365 already secure?
Not by default. Misconfigured permissions, open guest access and over-shared data can leave you exposed even when you believe you're protected. Our audits across Irish organisations keep finding the same hidden gaps — that's exactly what Cloud Shield 365 closes.
Is Cloud Shield 365 just an antivirus?
No. Antivirus is one layer; Cloud Shield 365 is ten, spanning identity, access and data security, MFA and data loss prevention, endpoint protection, monitoring of third-party apps, and automated response using Microsoft Sentinel and Defender.
What happens when an attack is detected?
Real-time monitoring is backed by our 24/7 team, and automated incident response contains threats quickly rather than waiting for someone to read an alert in the morning.
Does Cloud Shield 365 help with compliance?
Yes. Our compliance service is monitored by Cloud Shield 365, so your controls stay in place between audits, and it provides identity, monitoring and compliance-reporting guardrails when you roll out Copilot and other AI tools.
How do we find out where our tenant stands?
Start with the free health check: we review your current Microsoft 365 setup, tell you what's working and what's at risk, and agree a prioritised roadmap with you before switching protection on.
Free cyber security readiness assessment
How ready is your business for a cyber attack? Ten questions, three minutes, and a score with your three biggest gaps.
Not sure where to start?
Book a free 30-minute IT health check. We'll tell you what's working, what's at risk and what we'd fix first. No obligation.