Blog
This is my blog section. Here all new blog posts will be showed in reverse-chronological order. Just a fancy way to say newest-top.
At the left, you can view the categories, and on the right you can find the tags and Table of contents.
Cross-Tenant Message Recall in Exchange Online
Thursday, July 16, 2026 in Microsoft 365
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4 minute read
How the message recall feature works We have all been there. A email is sent and you forgot to add the attachment or the wrong recipient. Exchange Online already has the feature recall messages inside your own tenant but now the cross tenant recall …
Getting started with Terraform
Thursday, July 09, 2026 in Microsoft Azure
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9 minute read
Terraform described Terraform is a framework built by Hashicorp that lets you manage cloud infrastructure for Azure and Amazon Web Services using text files only. This does it by talking with the Azure Resource Manager API, the underlying system that …
Automatically clean up inactive Entra ID devices using Azure Automation
Thursday, July 02, 2026 in Microsoft Azure
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8 minute read
Requirements An Azure subscription PowerShell 7 installed Microsoft Graph PowerShell module installed Basic knowledge of PowerShell Basic knowledge of Microsoft Graph Around 30 minutes of your time Azure Automation vs. Logic Apps Azure Automation …
What is MTA-STS and how to use it to protect your email flow
Sunday, June 28, 2026 in Email security
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15 minute read
Requirements Around 30 minutes of your time Access to your domains’ DNS hosting to create DNS records An Azure Subscription if you want to publish your policy with a Static Web App A Github account if you use this option An Azure Subscription …
Encrypt your Microsoft 365 emails with S/MIME
Thursday, June 25, 2026 in Microsoft 365
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12 minute read
S/MIME explained S/MIME means Secure / Multipurpose Internet Mail Extensions. It’s an email security standard defined by the Internet Engineering Task Force which allows you to encrypt your email messages and attachments sent. In simple terms: It …
10 scripts for Ubuntu MDM with Microsoft Intune
Thursday, June 18, 2026 in Microsoft Intune
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7 minute read
Last week I described how to add Ubuntu endpoints to Microsoft Intune and improve their manageability. This guide can be found here: https://justinverstijnen.nl/adding-ubuntu-endpoints-to-intune This guide is a sort of “Part 2” and covers …
Important action: Configure additional authentication for Bitlocker leaks
Friday, June 12, 2026 in Microsoft Intune
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6 minute read
When Bitlocker is configured to only unlock with the TPM, we create an attack path which allows access to the unencrypted data. This is because you only need the disk and the TPM module to unlock by default. In the Bitlocker settings, there is an …
Adding Ubuntu endpoints to Microsoft Intune
Thursday, June 11, 2026 in Microsoft Intune
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10 minute read
Why add your Ubuntu endpoints to Microsoft Intune? This question has a very simple answer: compliance, management, and security. As IT professionals, we want to manage every endpoint from a single pane of glass while keeping compliance and security …
Disable Teams Premium Trial Button
Saturday, June 06, 2026 in Microsoft 365
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3 minute read
If we talk about the “Unlock Teams Premium” button, I mean this button which users get in their Teams client: Let’s show how to disable this button. Disabling the button can take up to 48 hours to process and to see results at your …
What is TLS-RPT and how to configure
Monday, June 01, 2026 in Email security
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6 minute read
What is TLS-RPT TLS-RPT stands for SMTP TLS Reporting. It is an email security reporting mechanism that gives you reports about TLS encryption problems for incoming email to your domain. The main goal is simple: it helps you see if other mail servers …