Microsoft 365 E5 Gaps Leave Room for Layered Email Security Solutions

Microsoft 365 E5 provides robust email security features, including Defender for Office 365 Plan 2. However, despite its strengths, there are specific gaps that determined attackers can exploit.

One of these gaps is the inability to detect advanced phishing attacks that carry no malicious payload. Microsoft Defender for Office 365 relies on reputation and machine learning-based detection methods, which can be bypassed by sophisticated attackers.

This is where layered email security comes in. IRONSCALES adds a layer of protection on top of Microsoft 365 E5 using native API integration, without disrupting mail flow or requiring MX record changes.

The company claims that its Adaptive AI can detect an average of 67.5 phishing emails per 100 mailboxes every month that already made it past Microsoft 365 and a legacy secure email gateway.