Most companies take it for granted that their data is going to be secure by default when they roll out Microsoft 365. Far from it, actually.
Office 365 does have built-in security when it comes to spam blocking and basic MFA (multi-factor authentication), but that is not enough security. Without having the right and multi-layered security setup, your business is still at risk of being hit by phishing, credential compromise, ransomware, and other attacks.
As Adam Bowles, ACT360 Director of Web Services, suggests to clients: “Office 365 is a starting point, but not a full security solution. True protection is about layering the appropriate tools, such as endpoint detection, monitoring, and proactive response, on top of a strong Microsoft 365 deployment.”
The False Sense of Security
Small and medium-sized enterprises prefer Microsoft 365 because it is reliable, affordable, and familiar. However, it is not a good idea to rely solely on its out-of-the-box security features. Remember the following facts:
- 74% of breaches involve the human element, like phishing and stolen credentials, based on Verizon’s 2023 Data Breach Investigations Report.
- Misconfigured Office 365 settings, like open file-sharing links, default admin rights, or lack of advanced threat detection, are frequently targeted by attackers.
This means that while Microsoft 365 provides a foundation, you still need additional protection.
What Office 365 Protects — And What It Doesn’t
Office 365 includes:
- Basic spam and malware filters
- Optional MFA
- Data loss prevention (DLP) tools
- Basic admin activity logging
But not:
- Advanced endpoint detection and response (EDR)
- Real-time breach alerts and threat hunting
- Deep configuration and patch monitoring
- Ransomware rollback or containment options
What ACT360 Adds: Real Protection That Fills the Gaps
At ACT360, we augment Microsoft 365 security by overlaying it with enterprise-grade tools like Huntress EDR and custom security rules crafted based on specific business needs.
This is what we do to secure our customers:
- Endpoint Detection & Response (EDR): Huntress scans continuously for suspicious activity, complemented by a 24/7 ThreatOps team to respond if needed.
- Proactive Monitoring: We track admin access, MFA, and login activity to identify anomalies early.
- Breach Containment: When the threat is detected, we lock down the affected account or device prior to spreading.
- User Training & Hardening: We educate your staff members to detect phishing scams and employ best practices on all accounts.
Don’t Wait Until It’s Too Late
Cybercriminals don’t care about how large your business is, but how exposed. One compromised email account can unleash thousands of records, client data, or internal systems.
Acquiring layered protection today will pay for your business in reduced downtime, legal fees, and reputation loss later.
📞 Ready to Strengthen Your Office 365 Security?
We will help you build a completely new, clean, multi-layered security infrastructure—starting from the solutions you already have and hardening where needed.
📧 Email: [email protected]
📞 Phone: 705-230-1120
🌐 Learn more: https://act360.ca/it-services/
Frequently Asked Questions
Microsoft 365 ships with real, functioning security — basic spam and malware filtering, optional multi-factor authentication, data loss prevention tools, and basic admin activity logging — but “basic” is the operative word. It’s a starting point built for broad coverage, not layered defense tuned to a specific business’s risk. As ACT360’s Adam Bowles puts it, Office 365 is a starting point, but not a full security solution.
Four things, mainly: advanced endpoint detection and response, real-time breach alerts backed by active threat hunting, deep monitoring of configuration and patch status, and any way to roll back or contain a ransomware attack once it’s already running. Office 365’s own defenses are mostly preventative up front and log-based after the fact — nothing is actively hunting for a breach already inside the systems. That’s the layer most small businesses assume exists and only discover is missing after something’s gone wrong.
Not by itself — MFA blocks a lot of basic credential-stuffing attempts, but it doesn’t stop the human element from being involved in 74% of breaches, per Verizon’s 2023 Data Breach Investigations Report. Phishing and social engineering can still trick someone into approving an MFA prompt they shouldn’t.
EDR — endpoint detection and response — is software that actively watches every device for suspicious behavior and can isolate a compromised machine before an attacker moves further into the network, something Office 365’s built-in tools don’t do. ACT360 layers in Huntress EDR backed by a 24/7 ThreatOps team specifically to cover that gap. For a small business, it’s the difference between finding out about a breach from a monitoring alert versus finding out when the files are already encrypted.
On its own, no — standard Office 365 doesn’t include ransomware rollback or containment tools, so once an attack is running, native features won’t reverse encrypted files or isolate the threat automatically. That’s specifically one of the gaps the article calls out, and it’s part of why layered protection like breach containment and account lockdown gets added on top. Recovery at that point usually depends on backups and the response speed of whoever is actually monitoring the environment.
The first step is usually a straightforward security assessment — a look at what’s already configured in Office 365, where the actual exposure sits, and which gaps matter most for that specific business rather than a generic checklist. From there it’s about layering in the missing pieces: EDR, proactive admin and login monitoring, breach containment procedures, and user training on phishing since that’s where most incidents start. None of it requires ripping out Office 365 — it’s built on top of what’s already there. Booking that assessment is the fastest way to see exactly where the gaps sit before they get tested by a real attack.
