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Office 365 Advanced Threat Protection (ATP) deep dive

Around 5 years ago (April 2015) Microsoft announced Exchange Online Advanced Threat Protection (ATP), which was renamed to Office 365 Advanced Threat Protection around a year later.

By using Office 365 Advanced Threat Protection you can add additional protection to the email filtering service available in Office 365 called Exchange Online Protection (EOP).

In this article, I will explain the functionality of Office 365 Advanced Threat Protection, and I will share the lessons learned while implementing the solution at several of my customers. I’ll also try to include as much references to other articles or blogposts as possible hopefully providing you with enough information for you to start implementing Office 365 ATP as well.

This article covers the following topics:

Disclaimer: This post reflects the status of Office 365 Advanced Threat Protection as of April 28 2020. Functionality may change, even right after this post has been published.

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Ask yourself if you still really need ADFS

In Q1 2017 Microsoft released the Pass Through Authentication (PTA) functionality as part of Azure AD connect. With the release of Azure Active Directory (Azure AD) Pass-through Authentication allowed for your users to sign in to both on-premises and cloud-based applications using the same passwords without the need to implement a Active Directory Federation Services (ADFS) environment.

With this options we now have the following authentication options available when setting up a hyrid identiy:

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