Some Windows 10 users complain that when launching Office 365 apps (Outlook, Teams, Word, Excel, etc.) or Outlook 2019/2016 (with Exchange Online mailbox), a blank white sign-in screen appears when they try to login to their Microsoft account. There is no prompt at all to enter authentication credentials. In this article, I’ve put together a few basic solutions to fix blank sign-in screen issues in Office 365 apps.
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
- Active DirectoryGroup Policies
Troubleshooting: Group Policy (GPO) Not Being Applied to Clients
March 15, 2024In this GPO troubleshooting guide, I’ll try to tell you about the typical reasons why a certain Group Policy Object (GPO) might not apply to an organizational unit (OU) or…
- Windows 10Windows 11Windows Server 2016Windows Server 2019
Using DISM to Check and Repair Windows Image
March 24, 2026You can use the SFC (System File Checker) and DISM (Deployment Image Servicing and Management) commands to check and repair the integrity of system files and Component Store of your…
- PowerShellWindows 10Windows 11Windows Server 2022
Find Windows Version, Edition, and Build from ISO or WIM file
December 29, 2021In this article, we’ll show how to use DISM and PowerShell to find out which Windows images (versions, editions, builds, language pack) are stored in ISO or WIM files. If…
In this post, we’ll show how to hide any program from the list of installed apps from the Windows Control Panel. This guide applies to all Windows versions, including Windows…
- Azure and Microsoft 365Group PoliciesLinuxMicrosoft OfficePowerShellWindows 10
How to Disable Microsoft Teams Auto Startup
March 12, 2024By default, when you install Office 365/Office 2019, all Microsoft Office apps are installed, including Teams (you can install only specific Office apps using the Office Deployment Tool). MS Teams…
- PowerShellWindows 10Windows 11Windows Server 2022
Changing the Default RDP Port (3389) on Windows
April 17, 2025By default, Windows uses TCP port 3389 to connect to the desktop of a remote computer via the RDP (Remote Desktop Protocol). This article describes how to change the default…
The problems with adjusting the screen brightness are common on laptops running Windows 11 or 10. The brightness slider in the Settings app may be missing or inactive, or the…
- PowerShellWindows Server 2019Windows Server 2022
Install Remote Desktop Services Host (RDS) without Domain (in a Workgroup)
March 24, 2026This article explains how to install and configure the Remote Desktop Session Host terminal server role on a standalone Windows Server 2022/2019 in a workgroup (without an Active Directory domain)…
- Active DirectoryGroup PoliciesWindows 10Windows Server 2019
Using GPResult Command to Check Applied GPOs and RSoP Data
May 11, 2023The GPResult.exe command-line tool is used to get a Resultant Set of Policy (RSoP) that is applied to a user and/or computer in an Active Directory domain. GPResult allows you…