Office 365 Security

Ensure Email Security and Compliance for Microsoft Office 365

Detect and Stop Threats and Data Loss with Email Security for Office 365

Email remains a primary conduit for business communications where threats and data loss need to be prevented. And while Microsoft Office 365 provides more freedom to work from anywhere, as email moves to the cloud, it makes it that much harder to detect malicious behavior and data exfiltration. More than 9 out of 10 attacks are delivered via the browser over the web and utilize different techniques including email-based phishing, macros and scripts in websites or mail attachments, and social engineering for business compromise. Fidelis makes it easy to add or replace email security for threat prevention, DLP, sandboxing, and collecting rich metadata to drive detection, response, and hunting.

Prevent Threats with Fidelis’ Office 365 Email Security

The Fidelis Mail Sensor, a component of Fidelis Network, examines Office 365 mail traffic to and from a Microsoft Exchange® server. Every email message is scanned in its entirety and analyzed by Fidelis’ proprietary threat intelligence and Malware Detection Engine — including signature, heuristic, sandbox, and machine learning analysis — to identify any inbound and outbound threats such as malware, malicious attachments, malicious web links, command and control activity and data leakage, including OCR image analysis of text. Once a threat is discovered, we can quarantine or prevent mail delivery.

Data Loss Prevention for Office 365

Fidelis also protects your organization with Data Loss Prevention (DLP). We build on Microsoft’s native security capabilities to fill email security gaps, find and stop unauthorized transfer of personally identifiable information (PII) and confidential data using email.


Monitor and enforce policy for email traffic to establish a secure and compliant Office 365 Email environment.

Prevent Data Theft

Quickly detect emails with sensitive data and quarantine or prevent mail delivery to halt data loss.

Detect Threats

Stay one step ahead of advanced attackers and insider threats by analyzing all email traffic, including malicious attachments.

Maintain Visibility

Fidelis maintains 100% visibility into your email traffic in the cloud by participating in the Mail conversation as a Message Transfer Agent.

Investigate Retrospectively

Enable retrospective analysis of historical, content-level metadata from email combined with threat intelligence.

Continuous Monitoring for Email-based Threats that Stops Attackers

Fidelis Email Security for Office 365 comes with out-of-the-box policies that provide a wide range of real-time alerts, prevention and quarantine options, advanced threat detection and security forensics capabilities. Fidelis Mail sensors track all URLs found in emails and apply additional scrutiny to any subsequent related session activity. Now you can identify an attacker or insider threat that is active on your network and unilaterally block unauthorized transfers of information in real time. Fidelis also enables detection in the cloud and then links that activity with related on-premise activity to uncover malicious behavior.

Office 365 Email Security - Fast Deployment and Easy to Use

Typical deployments of Fidelis’ virtual sensor take 10–20 minutes to be fully operational. Fidelis Email Security for Office 365 uses the Microsoft® Azure™ cloud to provide seamless interaction and no need for a physical appliance.

Fidelis Network® Mail Sensor Datasheet

Learn how Fidelis delivers Office 365 email security.Read the datasheet