In some cases, Outlook clients may stop updating the Exchange Global or Offline Address Book with the error “Outlook cannot update Global Address Book 0x80200049” or 0x80070057. You can add new user mailboxes or distribution groups to the Global Address List (GAL), hide the mailboxes or contacts from the address book, but the changes won’t appear on users’ computers.
Windows Server: Administration Guides
Step-by-step tutorials and comprehensive courses covering Windows Server installation, configuration, administration, and management. Learn to deploy server roles, manage Active Directory, configure networking, automate tasks with PowerShell, and implement security best practices for Windows Server 2012, 2016, 2019, and 2022 editions. Ideal for beginners and IT professionals seeking practical, hands-on knowledge to master Windows Server environments.
Windows 10 and 11 Tutorials for System Administrators
Guides and technical tutorials for system administrators, focusing on the configuration, deployment, and management of Windows 10 and Windows 11 desktop operating systems. Step-by-step instructions on installation, deployment, policy configuration, security hardening, and administrative tools to optimize Windows enterprise environments.
Group Policy (GPO) Guides for Admins
Clear, concise tutorials on creating and managing Group Policy Objects to control user and computer settings, enforce security, and streamline network administration in Active Directory environments.
- Configuring Firewall Rules With Group Policy
- How to Copy Files or Folders to All Computers with GPO
- Updating Group Policy Administrative Templates (ADMX) Files
- Active Directory Password Policy
- Applying Group Policy troubleshooting guidance
- Deploying printers via GPO
- Running PowerShell scripts using Group Policy
- Local Groups Policies export and import on Windows
Active Directory: Setup, Configuration, and Best Practices
Step-by-step tutorials and comprehensive resources for installing, configuring, and managing Active Directory Domain Services (AD DS). Learn how to set up domain controllers, design forest and domain structures, create users and groups, and implement security best practices.
- Updating AD Group Membership Without Restart or Logoff
- How to Detect the Source of Account Lockout in Active Directory
- Adding an Additional Domain Controller To an Existing AD Domain
- Active Directory Health Check
- Get-ADDomainController: How to Get Domain Controller Information with Powershell
- How to Transfer os Seize FSMO Roles in Active Directory
- Active Directory Backup Best Practices
- How to Reset Domain Admin Password in Active Directory
- Fix Trust Relationship Failed Issue without Domain Rejoining
- How to Extend Password Expire Date in Active Directory
- How to Find Inactive Accounts in Active Directory
Enterprise Virtualization Platforms
Expert guides and tutorials for system administrators on VMware, Hyper-V, and Proxmox virtualization. Covering installation, configuration, management, and optimization to build robust and scalable virtual environments.
PowerShell Scripting Tutorials
Practical guides to automate and manage a wide range of IT tasks using PowerShell. Learn how to streamline system administration, Active Directory, network configuration, software deployment, Microsoft 365 management, and more through powerful scripting and cmdlets.
VMware:Install and Configure Guides
Detailed walkthroughs for installing VMware ESXi, vCenter Server, and VMware Workstation Player, including configuration of virtual machines, network settings, and storage options to optimize your virtual infrastructure.
- VMware ESXi: Create VMFS Datastore on USB Drives
- Configuring iSCSI Datastore on VMware ESXi
- Add Drivers into VMWare ESXi Installation Image
- Adding Sound Controller to a VMWare VM
- Using Free VMware vSphere Hypervisor
- Adding an ESXi host to the VMware vCenter (vCSA)
- Reset VMware ESXi root password
- Disable the Virtual Machine Auto Suspend Feature in VMware Workstation/Player
You can use the open-source usbipd-win project to access a computer’s physical USB devices from the Windows Subsystem for Linux (WSL2) or Hyper-V virtual machine. This tool allows you to…
In some cases, users may need to send or forward an e-mail from an Outlook inbox directly to a Microsoft Teams channel. An e-mail address is automatically generated for each…
- Azure and Microsoft 365PowerShell
How to Restore Deleted Users in Entra ID (Microsoft 365)
March 17, 2024When you delete a user account in Azure (Microsoft 365), the user is not deleted immediately. The disabled user account is stored in AAD for 30 days. In this article,…
- Windows 11Windows Server 2016Windows Server 2019
Fix: Remote Desktop Services Is Currently Busy
March 15, 2024In some cases, users cannot sign to RDS farm hosts running Windows Server using the built-in RDP client (mstsc.exe) with the following error: The task you are trying to do…
- PowerShellWindows 10Windows 11Windows Server 2019
Send-MailMessage: Sending E-mails with PowerShell
March 17, 2024You can use the built-in Send-MailMessage cmdlet to send SMTP e-mails from PowerShell (previously you can use the .Net System.Net.Mail class to send e-mail messages). Send-MailMessage allows you to send…
- Group PoliciesPowerShellWindows 10Windows Server 2019
Clear Cache and Temp Files in User Profiles on Windows (RDS) with PowerShell and GPO
March 21, 2023Windows Server RDS farm administrators are often faced with the problem of running out of space on a system drive due to a large amount of user data. This article…
- Azure and Microsoft 365PowerShell
Prevent Users from Creating New Groups in Microsoft 365 (Teams/Outlook)
March 17, 2024By default, any user from your Azure tenant can create Microsoft 365 groups. When a user creates a new Microsoft 365 group, additional resources are automatically created: a Teams group,…
Locks in MS SQL Server are one way to ensure the integrity of data when changes are made by multiple users at the same time. MSSQL locks objects on a…
- Windows 10Windows 11Windows Server 2019
Copy/Paste Not Working in Remote Desktop (RDP) Clipboard
March 17, 2024You can use the clipboard in an RDP session to copy/paste text and files between a local computer and a remote host (this can be either a Windows workstation or…