In this episode Koos discusses the Odido data breach in The Netherlands by hacker group Shinyhunters, one of the largest public data leaks in Dutch history. Touching on vishing, misconfigurations, and the importance of blocking Device Code Flow. Chris was inspired by a fellow MVP to take a look at common AD security mistakes and provides some detail on how to look for these in your environment.

Full show notes available on our blog: https://df3ndr.io/episodes/2026/04/02/02x03-azure_fridays_but_its_us.now.html

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In this episode, Chris take a look at PowerShell modules and how managing M365 and Entra ID has changed over the years. And Koos likes to re-visit Passkeys. This is not new and we covered it earlier in our very first episode in December of 2024. But quite a few things have changed since then and he believes now is the time to start onboarding at scale.

Full show notes available on our blog: https://df3ndr.io/episodes/2026/03/01/02x02_you_shall_not_pass.key.html

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In this episode, Chris explores Agent 365 while Koos takes another look at Security Copilot. Since our last episode, several new announcements have dropped, making this a great time to dive in and see how these tools can help streamline the work of security teams.

Full show notes available on our blog: https://df3ndr.io/episodes/2026/02/01/02x01_scu_later_alligator.html

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Not your regular episode but an announcement for our upcoming second season. Chris and I share what we've been working in preparations for season 2, and what you can expect from us during the upcoming year.

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📍 Live from Times Square, New York City 🇺🇸 This was the first edition of Experts Live in the United States, and we couldn't be more proud to be part of it!

We wrap up Season One with a special in-person recording from Microsoft’s office in NYC during Experts Live US.

No planning, no script – just good conversation, best practices, and bad Sentinel acronyms. 😉 Chris and Koos will both be talking about their sessions they gave at the event.

Chris will discuss securitu baseline best-practices. And Koos will be sharing Sentinel tips from the field.

Full show notes available on our blog: https://df3ndr.io/episodes/2025/11/01/01x12_df3ndr.eof.01.tar.gz.html

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In this episode Chris asks "To block or not to block?" as he looks at geo blocking in Conditional Access, while Koos explores the human element in cybersecurity.

Full show notes available on our blog: https://df3ndr.io/episodes/2025/10/01/01x11_trust_me_im_a_keyboard_hid.html

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In this episode Koos takes a look at the recent release of Sentinel data lake and Chris shares 5 tips to help your Entra Privileged Identity Management (PIM) deployment.

Full show notes available on our blog: https://df3ndr.io/episodes/2025/09/01/01x10_lake_it_till_you_make_it_log.html

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In this episode Chris revisits Microsoft Entra Suite and takes a deep dive into GSA - Global Secure Access. Koos did a project recently where Defender for External Attack Surface Management (EASM) was also implemented. And he likes to share how awesome this product is, as well as share some practical tips and pitfalls you need to wary of.

Full show notes available on our blog: https://df3ndr.io/episodes/2025/08/01/01x09_open_port_regrets_pcap.html

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In this episode Koos returns to a somewhat controversial topic - Security Copilot, but this time without the hype and of course with some practical tips. Chris introduces Microsoft Entra Suite in the first of two episodes taking a look at these capabilities.

Full show notes available on our blog: https://df3ndr.io/episodes/2025/07/01/01x08_copilot_reinstall_bat.html

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In this episode Chris shares 5 things you should configure in Microsoft 365 to make your tenant more secure and Koos introduces "Summary Rules" in Microsoft Sentinel. What are "Summary Rules"? And what new opportunities might bring it to your logging strategies?

Full show notes available on our blog: https://df3ndr.io/episodes/2025/06/02/01x07_summarize-harden-take5.html

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