Posts by category

• Category: .NET
  • Using MySQL Database for Blazor Server Web App
  • Running Blazor Server Web App on Linux and Apache
  • Run your App as Unix Daemon in Ubuntu
  • Run a .NET Core C# Console App on Ubuntu
  • Blazor Server – Basics Part 12 – Create a Native Blazor UI Toggle Button Component
  • Blazor Server – Basics Part 11 – Create a Native Blazor UI Toggle Switch Component
  • Blazor Server – Basics Part 10 – MS SQL Server Access and Data Binding
  • Blazor Server – Basics Part 9 – Responsive Tags and Chips
  • Blazor Server – Basics Part 8 – JavaScript interoperability (JS interop)
  • C# Events and Delegates
  • Blazor Server – Basics Part 7 – C# Events, Delegates and the EventCallback Class
  • Blazor Server – Basics Part 6 – Query the on-premise Active Directory
  • Blazor Server – Basics Part 5 – Authentication and Authorization
  • Blazor Server – Basics Part 4 – Program.cs File
  • Blazor Server – Basics Part 3 – Custom Layout
  • Blazor Server – Basics Part 2
  • Blazor Server – Basics Part 1
  • Code Signing in Visual Studio
  • Using Google’s OAuth 2.0 API for an ASP.NET Core Web App
  • Azure AD – App Registrations vs. Enterprise Applications
  • Create an ASP.NET Core Web App using Azure AD Authentication
  • Create an ASP.NET Web Application (.NET Framework – Web Forms or MVC) using Azure AD Authentication
  • Set up Active Directory Federation Services (AD FS 5.0) – Create an ASP.NET Core Web App (Model-View-Controller) by using OAuth 2.0 & OpenID Connect – Part 7
  • Set up Active Directory Federation Services (AD FS 5.0) – Create an ASP.NET Web Application (.NET Framework – MVC) by using OAuth 2.0 & OpenID Connect – Part 6
  • Set up Active Directory Federation Services (AD FS 5.0) – Create an ASP.NET Core Web Application (MVC) using WS-FED – Part 5
  • The current .NET SDK does not support targeting .NET Core.
  • Microsoft SQL Server LocalDB
  • Set up Active Directory Federation Services (AD FS 5.0) – Create an ASP.NET Web Application (.NET Framework – Web Forms) using WS-FED – Part 4
  • A fatal error occurred while creating a TLS client credential. The internal error state is 10013
  • Global Assembly Cache (GAC) and .NET Framework Insights
  • Load a custom Assembly in SQL Server Integration Services (SSIS) Script Task that is not or cannot be stored in the GAC
  • Accessing Azure Storage Account File Shares from C# Applications
  • Create a C# Console App (.NET Framework) to export Mail Attachments from an Exchange Mailbox
  • .NET – How the Runtime Locates Assemblies
  • Microsoft Windows SDK
• Category: AD DS
  • Set up Microsoft Defender for Identity
  • What is Microsoft Entra Workload ID?
  • What is Microsoft Entra Verified ID?
  • What is Microsoft Entra Permissions Management?
  • What is Microsoft Entra External ID (Azure AD External Identities)?
  • What is Microsoft Entra ID Governance?
  • What is Microsoft Entra ID?
  • Set up and deploy BgInfo from Sysinternals in your Network
  • Using Azure File Sync in combination with an on-premise DFS Domain Namespace
  • Enroll Windows Computer into Microsoft Intune
  • AWS – IAM vs. IAM Identity Center vs. Directory Service
  • Office 365 Cross-Tenant Mailbox Migration (Corporate Merger Scenario)
  • Domain Controller Protection via BitLocker Drive Encryption
  • Windows Local Administrators Group Membership on Azure AD joined Devices
  • ZeroConfigExchange & ZeroConfigExchangeOnce
  • Prevent Members from Domain Users Group to Logon by default to any Domain joined Computers
  • Prevent Branch Office Domain Controllers from registering generic DNS Records and Netmask Ordering
  • Restore deleted Microsoft 365 Hybrid User
  • DFS Domain-based Namespace Folders are missing after replacing Domain Controllers
  • Force rebuild Active Directory Replication Topology across Site Links
  • Upgrade Windows Server 2016 Domain Controllers and AD Schema to Windows Server 2019 | Raise Active Directory domain and forest functional levels
• Category: AD FS
  • Set up Windows Hello for Business Hybrid Azure AD joined Devices
  • Disable Mandatory Windows Hello for Business Prompt on Azure AD joined Devices
  • How SAML 2.0 works
  • How OAuth 2.0 and OpenID Connect works
  • Modern Authentication Office 365
  • Set up Active Directory Federation Services (AD FS 5.0) – Identity Protocols used in AD FS – Part 8
  • Analyse AD FS SAML Claims with Fiddler
  • Set up an AD FS Federation Trust between two Organizations
  • Configure SAML SSO for Atlassian Confluence on-premises with ADFS
  • Set up Active Directory Federation Services (AD FS 5.0) – Certificate Requirements – Part 3
  • Set up Active Directory Federation Services (AD FS 5.0) – ADFS Reverse Proxy – Part 2
  • Set up Active Directory Federation Services (AD FS 5.0) – Internal ADFS Server – Part 1
• Category: Amazon Web Services (AWS)
  • AWS – Create a new Linux VM Instance and connect to using SSH
  • Google Cloud Organization vs. AWS Organizations vs. Microsoft Azure Management Groups
  • AWS VPC Routing
  • AWS AD Connector Directory – Domain Join
  • Set up AD Connector in AWS
  • Set up IPSec route-based S2S VPN between pfSense and AWS VPC
  • AWS Command Line Interface (AWS CLI)
  • AWS – Organizations and Control Tower
  • Installing or Updating the latest Version of the AWS CLI
• Category: Atlassian
  • SAML single sign-on for Atlassian Cloud with Azure AD
• Category: BGP
  • Azure VNet Routing
  • Set up Dynamic Routing with FRR (Free Range Routing) in pfSense – OpenBGPD now Depricated
  • IPSec dynamic route-based S2S VPN Tunnel between two pfSense Appliances
• Category: Blazor Server
• Category: C#
  • Accessing Azure Storage Account Blobs from C# Applications
  • Azurite emulator – emulating Azure Blob, Queue and Table services in your local environment
  • Asynchronous Programming in C#
  • Using a generic List with a custom data type in C#
  • Using an array with a custom data type in C#
  • Using List Tuples in C#
• Category: Dell PowerEdge
  • Update Firmware, UEFI and Device Drivers for Dell PowerEdge Servers by using the Dell iDRAC Lifecycle Controller
  • Update Firmware, UEFI and Device drivers for IBM x3650 M5 (5462) Server by using the Lenovo XClarity Essentials UpdateXpress
  • Update Firmware and UEFI for IBM x3650 M4 Server by using the Lenovo XClarity Essentials Bootable Media Creator
• Category: DevOps
  • Infrastructure as Code (IaC) – Part 6 – Terraform
  • Infrastructure as Code (IaC) – Part 5 – Azure Automanage Machine Configuration (formerly called Azure Policy Guest Configuration)
  • Infrastructure as Code (IaC) – Part 4 – Azure Automation State
  • Infrastructure as Code (IaC) – Part 3 – Desired State Configuration (DSC)
  • Infrastructure as Code (IaC) – Part 2 – Azure Resource Manager (ARM) templates
  • Infrastructure as Code (IaC) – Part 1
• Category: E-Mail
  • Set up Microsoft Defender for Office 365 
  • Email Authentication by using DMARC, DKIM and SPF
  • Set up DMARC (verification) for Postfix on Ubuntu
  • Set up DomainKeys Identified Mail (DKIM) in Office 365
  • Configure Postfix to block and reject Unsolicited Messages or Spam
  • Set up SPF and DKIM for Postfix on Ubuntu
  • How to reject Emails in Office 365 they fail DMARC
  • Set up DomainKeys Identified Mail (DKIM) on Exchange on-premise
  • Set up Exchange on-premise to relay outbound Emails to the Internet via Exchange Online Protection (EOP)
  • Enable TLS for Postfix on Ubuntu
  • Setup Postfix Mailserver with Dovecot and MySQL on Ubuntu 18.04.4 LTS Step by Step
• Category: Exchange
  • Offboarding Microsoft 365 Hybrid – Move to Cloud Only
  • Configure Free/Busy Cross Request (Exchange Online and Exchange on-premise) when both Organizations are Hybrid
  • Configuring federated sharing (free/busy calendar information) between Exchange Hybrid Organizations
  • Configuring federated sharing (free/busy calendar information) between on-premise Exchange Organizations
  • Removal of Exchange Certificate (New-,Renew-,Import-,Export-) Handling in Exchange Admin Center (EAC) Console
  • Control automatic external email forwarding in Microsoft 365
  • Outlook 2016/2019 Click to run – Adding multiple Office 365 E-Mail Profiles – Sorry, another account from your organization is already signed in on this computer
  • Renew Edge Subscription in Exchange Server after Cumulative Update
  • Enable External Users for booking and adding Exchange Room Calendars
  • Bypass Exchange Room Mailbox Delegation for specific Users
  • Appendix – Azure AD Connect Sync Errors Detected – Large Attribute – Extension thumbnailPhoto
  • Azure AD Connect Sync Errors Detected – Large Attribute – Extension thumbnailPhoto
  • Exchange/Outlook Download Offline Address Book Error 0x80190194
  • Exchange Online – Plus Addressing
  • Enable Hybrid Modern Authentication for on-premises Skype for Business and Exchange servers – Part 2 SFB
  • Enable Hybrid Modern Authentication for on-premises Skype for Business and Exchange servers – Part 1 Exchange Server
  • Exchange Classic Full Hybrid – Not all Mailbox Permissions fully supported and Automapping
  • Microsoft 365 Admin Center – Annoying Warning and Status Messages you can ignore
  • Exchange Online – We are preparing a mailbox for the user – Accounts still have an on-premise Mailbox and ExchangeGUID is synced successfully to Office 365
  • error – The connection to the server could not be completed | MRS Proxy Server
  • Exchange Server 2019 – Database Copy Component (HighAvailability) State is offline
  • Migration from onPremise to Office 365 – Part 4 -Troubleshoot Exchange Hybrid
  • Migration from onPremise to Office 365 – Step by Step – Part 3- Move Users from Exchange onPrem to Exchange Online
  • Migration from onPremise to Office 365 – Step by Step – Part 2- Exchange onPrem to Exchange Online (Exchange Hybrid Classic Full)
  • Migration from onPremise to Office 365 – Step by Step – Part 1 – Azure AD Connect
• Category: Fax Server
  • Set up GFI FaxMaker with XCAPI and AudioCodes Mediant VE SBC with DTAG SIP Trunk
  • Set up AudioCodes Fax Server and Mediant VE SBC with DTAG SIP Trunk
• Category: FreeBSD
  • pfSense 2.6.0 Upgrade results on Hyper-VMs in very slow network speed
  • Linux Hard Link vs. Soft Link (Symlink, Symbolic Link)
  • pfSense Boot Loop after Power Outage
  • SSH Session Timeout – TCP Keepalive
  • pfSense enable Logging for Firewall Rules to log internal Client IPs
  • Set up a Central Log Server with syslog-ng daemon on FreeBSD
• Category: General
  • Explore the Microsoft Defender Family
  • Set up Microsoft Defender for Endpoint
  • Set up Microsoft Defender for Cloud
  • Set up and deploy BgInfo from Sysinternals by using Microsoft Intune
  • How to enroll already Microsoft Entra joined (former Azure AD joined) Devices to Microsoft Intune?
  • Microsoft Graph PowerShell
  • What is Azure Arc-enabled servers?
  • What is Microsoft Entra?
  • What is Microsoft Entra Global Secure Access (Private Access)?
  • What is Microsoft Entra Global Secure Access (Internet Access)?
  • New subscription structure for Microsoft 365 in Europe
  • Default outbound access for VMs in Azure will be retired on 30 September 2025 – How to transition to an explicit method of public connectivity
  • Change Display Name in Azure for Azure AD joined Computers
  • Moving (Migrate) on-premises Hyper-V VMs to Azure
  • Enable Python for Apache Websites
  • Set up Redis Object Cache on Ubuntu for WordPress and the LiteSpeed Cache Plugin
  • How Azure AD Privileged Identity Management works?
  • Network Security Groups (NSG) vs. Application Security Groups (ASG)
  • Sysinternals and its PsExec Tool
  • Export/Import PuTTY Settings and Sessions
  • Configuration Manager – Management Point Critical Error
  • Re-Create ConfigMgr SQL Server Indentification Certificate
  • Co-Management with Microsoft Endpoint Configuration Manager and Microsoft Intune
  • Hot Potato vs Cold Potato Routing
  • UDP hole punching, ICE, STUN & TURN
  • Set up WireGuard Site-to-Site VPN on pfSense
  • Set up WireGuard Point-to-Site VPN on pfSense
  • VNet Peering between different Azure Active Directory Tenants
  • The trust relationship between this workstation and the primary domain failed
  • OwnCloud Files not showing up in the Browser
  • Visual Studio Yellow Triangle NuGet Package Missing Dependencies
  • Set up Google Cloud Directory Sync
  • IBM x3650 M4 – RAID5 HDDs fail with preserved cache retained
  • RDP to Azure Active Directory joined Windows 10 Computer
  • How to reveal hidden WLANs (Hidden SSID)
  • Google Cloud VPC Routing
  • Azure – Create a new Linux VM and connect to using SSH
  • Google Cloud – Connect to Linux VMs directly without Metadata or OS Login
  • Google Cloud – Connect to Linux VMs using SSH OS Login
  • Google Cloud – Create a new Linux VM Instance and Connect to using SSH Metadata
  • Linux Sudoers (sudo command) File
  • Google Cloud – Create and Connect to a new Windows VM Instance
  • Set up IPSec route-based S2S VPN between pfSense and Google Cloud VPC
  • Set up your Organization for Google Cloud Part II
  • Working Basics with the Google Cloud Platform (GCP)
  • Microsoft Azure Management Groups
  • Join Ubuntu to an Active Directory Domain using SSSD (System Security Services Daemon)
  • Google Cloud CLI (gcloud)
  • Google Cloud – Admin Console vs. GCP Console
  • Google Cloud Identity
  • Set up your Organization for Google Cloud
  • Create a new Device Collection in System Center Configuration Manger (SCCM) for Windows Server 2022
  • Determine Data Location from your Microsoft 365 Tenant
  • Manage Systemd Services with Systemctl on Ubuntu
  • Cloud Computing – Hyperscaler
  • Convert pfSense into a Routing Only Platform
  • Secure WordPress with fail2ban
  • Set up Ubuntu’s Built-In Firewall
  • Set up ownCloud on Ubuntu
  • Set up SSH private/public Key Pair without using Password Authentication on Linux
  • Remote Desktop Services (RDS) – Published RDP Icon is gone after publishing further Remote Apps later
  • MySQL – Access denied for user ‘root’@’localhost’
  • Installing SAP Data Intelligence on Azure Kubernetes Service – Part 3
  • Installing SAP Data Intelligence on Azure Kubernetes Service – Part 2
  • Installing SAP Data Intelligence on Azure Kubernetes Service – Part 1
  • Azure AD Connect – Unable to validate credentials due to an unexpected error.
  • Teams PowerShell several Cmdlets doesn’t work – ErroUnable to cast object of type ‘System.Management.Automation.PSListModifier’ to type ‘System.String’
  • Upgrade Windows Server from Standard to Datacenter on the fly.
  • Deleting Windows Folder recursive will failed with Access Denied
  • Licensing mode for the Remote Desktop Session Host is not configured.
  • Prefer IPv4 over IPv6 in Windows Networks
  • Adjust a Date from Past or Future on Windows Server permanently
  • Install Ubuntu as Hyper-V Generation 2 Virtual Machine
  • Wireless 802.11 RADIUS Authentication over Site-to-Site IPSec VPN Tunnel failed
  • Set up SFTP Chroot Jail
  • Active Directory Certificate Mapping – Implicit vs. Explicit
  • Set up a Key Recovery Server for the Microsoft certification authority (CA)
  • Configure certificate auto-enrollment
  • Set up a RADIUS Server on Windows Server 2019 for 802.1X Wireless Connections
  • Using HTTP Strict Transport Security (HSTS) with Apache2
  • Numbering the IPv4 and IPv6 WAN Link between ISP and Customer
  • Apache HTTP Server and .htaccess
  • Set up Fail2ban on Ubuntu 20.04.3 LTS
  • Nikto Web Server Scanner
  • Set up ModSecurity (Libmodsecurity | ModSecurity v3 project) for Apache on Ubuntu
  • Set up MediaWiki on Ubuntu 20.04.3 LTS
  • Move Home Directory to another dedicated Drive/Partition in Linux
  • Change Owner for Azure AD joined Windows 10 Devices
  • Azure Stack Hub, HCI and Edge
  • Non Converged, Converged and Hyperconverged Infrastructure
  • Microsoft SQL Server – FCB::Open failed: Could not open file mastlog.ldf for file number 2. OS error: 5(Access is denied.)
  • PetitPotam NTLM Relay Attack – Mitigating NTLM Relay Attacks on Active Directory Certificate Services (AD CS)
  • Set up a lean Branch Office Network without any Servers and DCs inside by using an IPSec S2S VPN Tunnel connected with the Headquarters Network
  • Microsoft 365 Groups vs. Microsoft Teams Team
  • Microsoft Bookings
  • Task Scheduler Task returns 0x1 for Batch File
  • Longest Prefix Match aka Maximum prefix length match
  • Azure AD Connect Sync Architecture – Simplified
  • Window 10 Activity History – How to View and Delete
  • Azure Hybrid Cloud – Enable Azure AD Password Writeback and self-service Password Reset
  • Assign Microsoft 365 Licenses to a Group instead to each user by hand
  • Set up Windows Autopilot – Production Environment from external – Part 2
  • Set up Windows Autopilot – Part 1
  • MiB and GiB vs. MB and GB momory size notation – What’s the Difference?
  • Configure Hybrid Azure AD join for managed domains
  • Install Windows Subsystem for Linux (WSL)
  • Azure AD – Federated Domain vs. Managed Domain
  • Primary Refresh Token (PRT) in Azure and Microsoft 365
  • Providing SSO in Azure AD and Microsoft 365
  • List of Authentication Protocols
  • Set up Apache Superset on Ubuntu using Docker Compose
  • Redirect from HTTP to HTTPS using the IIS URL Rewrite module
  • Move-CsUser : HostedMigration fault: Error=(201), Description=(Cannot find user in Active Directory with the following SIP URI
  • Set up an internal LAN and Perimeter Network with public IPv6 Addresses and pfSense
  • pfSense – enable the Thermal Sensors to display the CPU Temperature on the Dashboard
  • Microsoft Teams exploratory License
  • Bypass spam filtering in Exchange Online (Office 365) for specific Sender Domain
  • pfSense 2.5.0 Bug – Router Advertisements Server is active by default on internal LAN Interface – Multiple Errors like – Renaming of LAN Interface or setting up OpenVPN Server runs into an error regarding IPv6 Configuration
  • Microsoft Teams Meeting – Start recording is greyed out
  • pfSense – webConfigurator default Certificate expiring
  • Set up a Perimeter Network with public IPv4 Addresses and pfSense
  • SCCM (System Center Configuration Manager) slow or stucking Console/GUI
  • Microsoft Teams Direct Routing – Call Forwarding – AudioCodes Mediant VE SBC with DTAG SIP Trunk – Message Manipulation – Change displayed number from forwarded Calls
  • Call Forwarding Teams Direct Routing with AudioCodes Mediant VE SBC and DTAG SIP Trunk – from external to external – no audio
  • Dell iDRAC RAC0225: Sending the test mail failed
  • ACL , ACE , DACL, SACL, MAC and RBAC
  • Office 365 / Exchange Online Block Sender Domain
  • pfSense | Site-to-Site IPSec VPN | Subnets on each Site are identical
  • Troubleshoot AudioCodes Configuration Wizard wrong settings for DTAG and Teams
  • Migration from onPremise to Office 365 – Step by Step – Part 6 – Route your onPrem SIP Trunk to Skype for Business and Teams (Hybrid Voice Connectivity | Direct Routing)
  • SQL Server Integration Services (SSIS) Basics – Script Task
  • SQL Server Integration Services (SSIS) Basics – Load Data from a MySQL Database into SQL Server
  • Manage Azure and Microsoft 365 services with PowerShell and CLI
  • Migration from onPremise to Office 365 – Step by Step – Part 5 – Skype for Business onPrem to Skype for Business Online and Teams
  • External Identities in Azure Active Directory
  • Set up pfSense as a Forward Proxy with Squid and configure access for Linux and Windows Clients
  • IPSec policy-based S2S VPN Tunnel between pfSense and an Azure VNet
  • Set up an Azure SQL Managed Instance and connect over a S2S IPSec VPN from onPrem network
  • Configuring a Syslog Server on pfSense with the syslog-ng Package
  • Deploy WordPress in Azure App Service (Web App) with staging slots for the production and development environment
  • Configure Windows Service Accounts and Permissions exemplary on SQL Server 2019
  • Local user accounts in Windows
  • Set up Group Managed Service Accounts (gMSA) vs. Standalone Managed Service Accounts (sMSA)
  • Move Azure AD Connect to another Server
  • Install Skype for Business Server 2019 Step by Step
  • RDS Remote Desktop Services HTML 5 Client Setup
  • SSO Single-Sign-On to your onPremise RDS Remote Desktop Services 2016/2019 Environment
  • Replace the self-signed Remote Desktop Certificate with an PKI Certificate from your internal CA
  • Troubleshooting Skype for Business external sign-in issues and examine the client sign-in process
  • Set up OpenVPN (pfSense) Point-to-Site (P2S) with RADIUS/Active Directory Authentification
  • IPSec dynamic route-based S2S VPN Tunnel between pfSense and an Azure VNet
  • What is the WoW64 (Windows 32-bit on Windows 64-bit) Subsystem?
  • Skype for Business Call Forwarding and Unified Messaging with Exchange 2013 | Step by Step
  • Skype for Business Conferencing | Step by Step
  • Configure Skype for Business Enterprise Voice with a SIP-Trunk (DeutschlandLAN SIP Trunk) and the Office Master Gate from Ferrari electronic AG | Step by Step
  • SFTP / SSH Server unter Windows einrichten mit Cygwin | Step by Step
• Category: Google Cloud
• Category: Hype-Jargon
• Category: IBM X3650
• Category: IEEE 802.11 WLAN
• Category: Infrastructure as Code (IaC)
• Category: IPv4 | IPv6
• Category: Kubernetes
• Category: Let's Encrypt
  • Let’s Encrypt certbot-auto depricated
• Category: Linux
  • Set up a Central Log Server with Rsyslog on Ubuntu
• Category: Microsoft 365 (Office 365)
  • Installing AudioCodes Mediant VE SBC on Hyper-V
  • Migration from onPremise to Office 365 – Part 7 -Troubleshoot Skype for Business Hybrid
  • HCW8064 – HCW has completed, but was not able to perform the OAuth error when running Hybrid Configuration
  • Set up AudioCodes Virtual Edition (VE) SBC in Azure for Microsoft Teams Direct Routing with DTAG’s SIP Trunk
  • Set up Office Master Gate 5.0 with Microsoft Teams Direct Routing and DTAG’s SIP Trunk
  • Restrict Access to Azure and Office 365 by Country
• Category: Microsoft Azure
  • Azure AD B2B (Business-to-business) Federation and Collaboration
  • Co-Management with System Center Configuration Manager (SCCM 1910) and Microsoft Intune
  • Azure Active Directory Domain Services (AADDS) | Domain Join for external Windows Client Workstations with P2S VPN at Logon Screen established
• Category: Microsoft Defender
• Category: Microsoft Entra
• Category: Microsoft Intune
• Category: Microsoft Teams
• Category: OAuth2.0
• Category: OpenID Connect
• Category: pfSense
• Category: Postfix
• Category: PostgreSQL
  • Upgrade PostgreSQL from version 9 to 10 on Ubuntu
• Category: PowerShell
  • Set and Change the PowerShell default Working Directory
• Category: Python
• Category: SAML 2.0
• Category: SAP
• Category: Security
• Category: Session Border Controller (SBC)
• Category: SQL Server
  • SQL Server Integration Services (SSIS) Basics – Installation
  • msiexec – Uninstall broken Installations
• Category: System Center
• Category: TLS/SSL
• Category: Visual Studio
• Category: VPN
• Category: Web server
• Category: Windows
• Category: X.509 PKI