https://rdr-it.com/en/System administration, virtualization, security and tools for IT professionals.en-USFri, 09 Oct 2026 17:31:24 +0000https://rdr-it.com/en/migrating-from-keycloak-to-authentik-using-powershell/Wed, 07 Oct 2026 04:30:00 +0000https://rdr-it.com/en/migrating-from-keycloak-to-authentik-using-powershell/Easily migrate from Keycloak to Authentik using a PowerShell script. Learn how to export users and groups from a Keycloak realm and automatically import them into …https://rdr-it.com/en/exchange-managing-permissions-for-shared-folders-using-security-groups/Wed, 30 Sep 2026 04:30:00 +0000https://rdr-it.com/en/exchange-managing-permissions-for-shared-folders-using-security-groups/In this article, I’ll explain how to manage mailbox delegation: Full access using a security group in Exchange. The following applies to both user mailboxes and shared …https://rdr-it.com/en/exchange-managing-calendar-permissions-in-powershell-using-the-exchange-management-shell/Wed, 23 Sep 2026 04:30:00 +0000https://rdr-it.com/en/exchange-managing-calendar-permissions-in-powershell-using-the-exchange-management-shell/In this tutorial, I’ll explain how to manage calendar permissions using the Exchange Management Shell (PowerShell). A common request when managing an Exchange environment …https://rdr-it.com/en/exchange-automatically-empty-the-deleted-items-folder/Wed, 16 Sep 2026 04:30:00 +0000https://rdr-it.com/en/exchange-automatically-empty-the-deleted-items-folder/In this tutorial, I’ll explain how to automatically empty the Deleted Items folder in Exchange 2016 and Exchange 2019 mailboxes. It’s possible to configure the Outlook …https://rdr-it.com/en/generate-a-pfx-certificate-from-a-key-and-a-crt-file/Wed, 09 Sep 2026 04:30:00 +0000https://rdr-it.com/en/generate-a-pfx-certificate-from-a-key-and-a-crt-file/In this tutorial, I’ll explain how to convert a certificate to PFX format from .key and .crt files. To convert a certificate to PFX format, you’ll need OpenSSL. In this …https://rdr-it.com/en/activate-a-windows-server-evaluation-version/Wed, 02 Sep 2026 04:30:00 +0000https://rdr-it.com/en/activate-a-windows-server-evaluation-version/As you may have noticed, when you buy a server, manufacturers (Dell, HP, etc.) no longer provide OS support (ISO). So if you want to reinstall the server, you’ll need to …https://rdr-it.com/en/windows-keeps-restarting-in-a-loop-after-updates-any-solutions/Wed, 26 Aug 2026 04:30:00 +0000https://rdr-it.com/en/windows-keeps-restarting-in-a-loop-after-updates-any-solutions/In this tutorial, I’ll explain how to try to fix the problem where Windows keeps restarting in a loop after updates. The following is not a universal solution and may not …https://rdr-it.com/en/how-to-install-passbolt-on-linux-using-docker/Fri, 21 Aug 2026 05:00:00 +0000https://rdr-it.com/en/how-to-install-passbolt-on-linux-using-docker/Apprenez à installer Passbolt, le gestionnaire de mots de passe open source, sur un serveur Linux en utilisant Docker. Un guide pas à pas pour un déploiement rapide.https://rdr-it.com/en/generate-a-lets-encrypt-wildcard-certificate-with-certbot-and-cloudflare-dns-01/Wed, 19 Aug 2026 04:30:00 +0000https://rdr-it.com/en/generate-a-lets-encrypt-wildcard-certificate-with-certbot-and-cloudflare-dns-01/Step-by-step tutorial for generating a Let’s Encrypt wildcard certificate with Certbot using the DNS-01 challenge for a domain hosted on Cloudflare.https://rdr-it.com/en/deploying-vaultwarden-with-docker/Mon, 17 Aug 2026 05:00:00 +0000https://rdr-it.com/en/deploying-vaultwarden-with-docker/In this tutorial, I’ll explain how to deploy Vaultwarden usingDocker andDocker Compose to self-host a password manager. Before we begin, let me introduce you to …https://rdr-it.com/en/keycloak-configuring-ad-fs-as-an-identity-provider/Fri, 14 Aug 2026 05:00:00 +0000https://rdr-it.com/en/keycloak-configuring-ad-fs-as-an-identity-provider/Overview In this tutorial, I’ll explain how to configure Microsoft AD FS as an identity provider in Keycloak. Both Keycloak and AD FS are authentication solutions that …https://rdr-it.com/en/fortimail-disable-smtp-authentication/Wed, 12 Aug 2026 04:30:00 +0000https://rdr-it.com/en/fortimail-disable-smtp-authentication/In this tutorial, I’ll explain how to disable SMTP authentication on the Fortimail MTA, which is enabled by default. SMTP authentication allows you to use the Fortimail …https://rdr-it.com/en/exchange-calendar-remove-the-organizer-from-the-subject-of-a-room-booking/Mon, 10 Aug 2026 05:00:00 +0000https://rdr-it.com/en/exchange-calendar-remove-the-organizer-from-the-subject-of-a-room-booking/By default in Exchange, when a user books a meeting in a room, the subject of the booking displays the user’s name rather than the meeting subject. You can change this …https://rdr-it.com/en/exchange-hide-users-in-an-organizational-unit-from-the-address-book/Fri, 07 Aug 2026 05:00:00 +0000https://rdr-it.com/en/exchange-hide-users-in-an-organizational-unit-from-the-address-book/In a company that manages an on-premises Exchange installation, it is common practice to keep the accounts of users who leave the company active for a few weeks after …https://rdr-it.com/en/fortimail-configuring-dkim-for-an-email-domain/Wed, 05 Aug 2026 04:30:00 +0000https://rdr-it.com/en/fortimail-configuring-dkim-for-an-email-domain/In this tutorial, I’ll explain how to configure DKIM on Fortimail for an email domain for outgoing emails. To put it simply, DKIM allows you to sign outgoing emails; this …https://rdr-it.com/en/wazuh-deploying-a-siem-and-edr-with-docker/Mon, 03 Aug 2026 05:00:00 +0000https://rdr-it.com/en/wazuh-deploying-a-siem-and-edr-with-docker/In this tutorial, I’ll explain how to deploy Wazuh using Docker. Introduction to Wazuh To begin, I’ll introduce Wazuh . Wazuh is an open-source security platform that …https://rdr-it.com/en/keycloak-integration-with-an-active-directory-directory/Fri, 31 Jul 2026 05:00:00 +0000https://rdr-it.com/en/keycloak-integration-with-an-active-directory-directory/In this tutorial, I’ll explain how to set up an LDAP connection Active Directory with Keycloak. Integrating with Active Directory will allow users to authenticate with …https://rdr-it.com/en/ubuntu-display-s-m-a-r-t-data-for-an-nvme-drive/Wed, 29 Jul 2026 04:30:00 +0000https://rdr-it.com/en/ubuntu-display-s-m-a-r-t-data-for-an-nvme-drive/In this tutorial, I’ll explain how to view the S.M.A.R.T. (Self-Monitoring, Analysis, and Reporting Technology) data for an NVMe drive on Ubuntu using the command line. …https://rdr-it.com/en/windows-11-rename-the-computer/Mon, 27 Jul 2026 05:00:00 +0000https://rdr-it.com/en/windows-11-rename-the-computer/You’ve just set up your computer with Windows 11 and want to rename it because you don’t like the name DESKTOP-XXXX. In this tutorial, I’ll explain how to do it.https://rdr-it.com/en/ubuntu-testing-disk-performance-from-the-command-line/Fri, 24 Jul 2026 04:30:00 +0000https://rdr-it.com/en/ubuntu-testing-disk-performance-from-the-command-line/In this tutorial, I’ll explain how to test the read and write performance of a disk on Ubuntu using the command line. To give you some points of comparison, I ran the …