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Microsoft Defender for Office 365

Microsoft Defender for Office 365 gives you powerful automation to protect your organisation against malicious threats, email compromise, and credential phishing.

Phishing attacks are one of the biggest threats to your organisation.

27% of businesses experience attacks at least once a week – Phishing attacks accounting for 91% of breaches for large organisations.

UK Government's Cyber Security Breaches Survey 2021

Posing as innocent-looking emails, links (URLs), and collaboration tools, these stealth attacks sneak into your network – often under the radar of your security team – and can go undetected for months.

And these malicious campaigns are becoming increasingly sophisticated and difficult to spot. By the time they’ve been detected, the hacker has infiltrated your network and extracted valuable data.

Pinpoint and stop attacks with Microsoft Defender for Office 365

Superpowered by AI, Microsoft Defender for Office 365 gives you industry-leading protection that goes beyond traditional security tools.

With extended protection that safeguards the collaboration and productivity tools your users rely on; Defender for Office 365 goes one step further to keep your organisation running smoothly – both in and out of the office.

Microsoft Defender for Office 365 helps you:

  • Easily adopt – and maintain – the most secure best practice backed configurations.
  • Stave off attacks across the kill chain with one complete solution for collaboration.
  • Set up powerful automated responses that amplify security across Microsoft products.
  • Use industry-leading AI and automation to improve the efficiency of your workflow.
  • Identify and remediate user education and awareness gaps before the bad guys do.
  • Gain native protection that boosts productivity, simplifies admin., and cuts costs.
Defender for Office 365 Demo

Defender for Office 365 Demo

See Defender for Office 365 in action. Covering key features and functions, we'll show you:

  • Custom policy creation and reporting dashboards
  • Cutting-edge investigation and response capabilities
  • How to improve protection, trial, and migrate to Defender
Watch now

You’ve got (suspicious) mail

Complex and/or out-of-date device and environment configuration leave your network wide open to smart new attacks. Add multiple users, devices, and off-site locations into the mix and you’ve extended an open invitation for cybercriminals to enter your environment.

Your challenges:


Too many policy options and configurations make staying on top of best practice processes and closing gaps a never-ending challenge.

Wasted resources

Your current email protection solutions are repetitive, costly, and time-consuming – which means you’re wasting valuable security resources.

Poor integration

Complex third-party mail protection solutions take forever to set up, remain imperfect – with admins operating multiple portals.


Third-party protection solutions struggle to protect your internal email – while those added mail routing configurations add complication.

Internal threats

You know your users are key to enhancing your security posture, but they don’t have the right level of threat awareness to work securely.

Keeping pace

Attacks don’t stop at email – and malicious actors are now adapting their tactics to focus on less-protected platforms.

Great level of knowledge and all of the team were great to work with. A very positive experience for Stobart Group. Thank you!

David Mossop Head of Group IT Stobart Group

ThirdSpace's consultants worked closely with our team throughout the process. They have always been very responsive to our needs. They’re flexible and extremely knowledgeable.

RSA Group

ThirdSpace's willingness to roll up their sleeves and get stuck in is the reason we are enjoying the success we have today.

Human Tissue Authority

Deploy your best line of defence

From awareness and detection to prevention and remediation, Defender for Office 365 gives you the support you need to hunt down – and prevent – malicious attacks.

Attack prevention

Robust filtering stack prevents a variety of volume-based and targeted attacks, including business email compromise (BEC), credential phishing, ransomware, and advanced malware.

Augmented detection

Industry-leading AI means you can detect malicious and suspicious content, and correlate attack patterns to identify even the most sophisticated and evasive campaigns.

Advanced hunting

Powerful experiences help you identify, prioritise, and investigate threats, while advanced hunting capabilities let you track attacks across your entire Office 365 network.

Automated response

Defender for Office 365 gives you the extensive incident response and automation capabilities you need to amplify your security team’s effectiveness and efficiency.

Educated users

Attack simulation training – along with integrated experiences within client apps – helps your users build the skills they need to detect, assess, and remediate risks themselves.

Enduring security

Microsoft Defender for Office 365’s recommended templates, configuration insights, and customisable policies help you to get – and stay – secure as the threat landscape evolves.


What’s attack simulation training?

Attack simulation training lets you run realistic attack scenarios to help you identify and find vulnerable users before a real attack impacts your organisation’s bottom line.

You’ll be able to put your security measures to the test with a range of social engineering techniques, including:

  • Credential harvest: An attacker sends a message containing a URL that directs users to a website (often posing as a well-known brand) that’s designed to steal sensitive information.
  • Malware attachment: The attacker sends the recipient a message that contains an attachment that, once opened, runs arbitrary code on the user's device to help the attacker dig even deeper into your network.
  • Link in attachment: A hybrid of a credential harvest, this is where the attacker sends a message that contains a URL inside of an attachment.
  • Link to malware: An attacker sends a message containing a link to an attachment on a well-known file sharing site (such as SharePoint Online or Dropbox) that releases arbitrary code that lets attacker infiltrate your network.
  • Drive-by-URL: An attacker sends a message containing a URL that, once clicked, leads to a website that tries to run background code to either gather information about the recipient or deploy arbitrary code on their device.

Case studies


Microsoft security suite pays dividends for a UK asset management company’s security posture

Read More
Contact us for advice

Try Defender for Office 365 evaluation mode

Making the switch from your current email protection provider is nerve-racking. Microsoft get it – and their new evaluation experience is designed to eliminate the complexities of device and environment configuration.

Defender for Office 365’s evaluation mode lets you assess how the technology will help your security operations team in their daily tasks.

You’ll benefit from:

  • A ‘try before you buy’ perk that has zero impact on daily operations - your users and current mail routing are completely unaffected
  • Seeing the potential benefits in your environment – view easy-to-read reports on the attacks that would have been blocked
Contact us for advice

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Microsoft Defender for Office 365 vs Mimecast – evaluate and migrate

Webinar: Defender for Office 365 Demo

See how Microsoft’s email security tool protects against phishing and malware.

Watch now

Need some help?

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Eight-time winner of the Microsoft Partner of the Year Award for Identity Management, Enterprise Mobility, and Security and Compliance.

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