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For most organizations, Microsoft 365 is the foundation of daily business operations. Email, file sharing, collaboration, and communication all depend on it. What many business leaders don’t realize, however, is that Microsoft 365 is not fully secure by default.
While Microsoft provides powerful tools, protecting user accounts requires ongoing configuration, monitoring, and adaptation to new threats. Today, one of the most common and costly risks facing organizations is account takeover fraud. This occurs when attackers gain access to legitimate user accounts and use that trust against the business.
Cybercriminals no longer rely on crude phishing emails or guessing passwords. Instead, they target people, not systems, using increasingly sophisticated tactics.
Some of the most common methods include:
In many cases, attackers don’t need to “break” security. They simply wait for a user to click, approve, or trust the wrong thing.
Multi-factor authentication (MFA) is one of the most important protections in Microsoft 365, and it should be enabled for every user. However, simply turning MFA on is no longer enough on its own.
Attackers have shifted their focus away from breaking technology and toward manipulating people. Instead of trying to defeat MFA, they look for ways to work around it by creating confusion, urgency, or fatigue. One of the most common examples of this is a technique known as MFA push bombing.
Here’s a simple look at how this type of attack works in real life.
Once an attacker gains access to a Microsoft 365 account, the real risk begins. Because the activity comes from a legitimate user account, it often looks normal at first and can go unnoticed.
This is how many account takeovers turn into larger business problems. Attackers may quietly read emails, hide important messages, or send convincing requests that appear to come from trusted employees. By the time something feels “off,” the damage may already be done.
This is why protecting Microsoft 365 users isn’t just about turning on security features — it’s about ensuring those protections are properly configured, monitored, and adapted as threats evolve.
Effective protection against account takeover fraud requires a layered, proactive approach that focuses on both technology and behavior.
This includes:
Just as important, these controls must be reviewed, updated, and monitored continuously.
Threats targeting Microsoft 365 users are constantly changing. Attackers adjust their techniques faster than static configurations can keep up.
That’s why many organizations are moving toward managed Microsoft 365 security as part of their broader IT strategy. The goal isn’t complexity — it’s consistency, visibility, and peace of mind.
When user security is actively managed:
One of the biggest reasons account takeover fraud succeeds isn’t a lack of tools - it’s inconsistency.
Over time, Microsoft 365 environments change. New users are added, settings are modified, and security policies drift from best practices. Even small changes can quietly reintroduce risk, especially around MFA, email security, and access controls.
That’s why at Locknet, we take a standards-based approach to Microsoft 365 security.
Rather than relying on one-time configuration or manual spot checks, we evaluate each tenant against a defined “gold standard” for Microsoft 365 security. This baseline reflects modern best practices for protecting user accounts, reducing phishing risk, and limiting the impact of compromised credentials.
Using Locknet Inforcer, we’re able to:
This approach allows us to reduce risk proactively, rather than reacting after an account has already been compromised.
Account takeover fraud is no longer a rare or highly technical problem. It’s a common business risk driven by trust, user behavior, and increasingly sophisticated social engineering.
Microsoft 365 provides a strong foundation, but real security comes from how it’s configured, monitored, and maintained over time. Organizations that treat user account security as an ongoing responsibility, instead of merely a checkbox, are far better positioned to prevent breaches before they impact operations.
Ready to protect your business? Don’t leave Microsoft 365 security to chance. Partner with Locknet for managed IT services that deliver consistent protection, expert monitoring, and peace of mind. Contact us to learn how our comprehensive managed IT services which include Locknet Inforcer Microsoft 365 security can keep you one step ahead of evolving threats.
