All Guides

253 step-by-step IT guides and fixes across Windows Server, Microsoft 365, Teams, Windows, Docker, and virtualization.

All Windows Server & Active Directory Microsoft 365 & Exchange Microsoft Teams Windows 10 & 11 Docker & Containers Virtualization (Hyper-V, VMware, VirtualBox) Proxmox VE AI Coding Tools & Models

Microsoft 365 & Exchange

How to Fix OneDrive Sync Problems in Microsoft 365

OneDrive stuck syncing or showing red X errors? Work through reset, sign-in, file path, and storage fixes for OneDrive sync problems in Microsoft 365.

MCSA Guru Team Sep 16, 2026 6 min read

Cover showing the Account Lockout Policy node in the Group Policy Management Editor with threshold, duration, and reset counter settings

Windows Server & Active Directory

How to Configure Account Lockout Policy Using Group Policy

Set account lockout threshold, duration, and reset counter with Group Policy. Practical settings, where the policy lives, common mistakes, and how to find locked-out users.

MCSA Guru Team Sep 15, 2026 7 min read

Cover showing a Proxmox virtual disk being expanded, with the guest partition and filesystem growing to fill the new space

Proxmox VE

How to Resize a Proxmox VM Disk

Grow a Proxmox VM disk safely: resize it in the GUI or with qm, then expand the partition and filesystem inside Linux or Windows guests. Why shrinking is the hard part.

Sysadmin Desk Sep 14, 2026 8 min read

Diagram-style cover showing a Hyper-V virtual machine being exported from one host and imported onto another with its VHDX and configuration files

Virtualization (Hyper-V, VMware, VirtualBox)

How to Export and Import Hyper-V Virtual Machines

Move Hyper-V VMs between hosts with Export and Import. Learn the GUI steps, Export-VM and Import-VM in PowerShell, the three import types, and how to avoid ID conflicts.

Sysadmin Desk Sep 13, 2026 7 min read

Comparison chart of the four Docker restart policies showing how each reacts to a crash, a reboot, and a manual stop

Docker & Containers

Docker Restart Policies Explained: no, always, unless-stopped, on-failure

What no, always, unless-stopped, and on-failure actually do in Docker. How each handles crashes, reboots, and manual stops, plus the gotchas that catch people.

Sysadmin Desk Sep 12, 2026 7 min read

Windows 10 & 11

How to Fix No Sound in Windows 11

No sound in Windows 11? Work through output device selection, volume mixer, the audio troubleshooter, driver reinstalls, and the Windows Audio services step by step.

MCSA Guru Team Sep 11, 2026 6 min read

Layered diagram showing Teams notifications passing through Windows notification settings, Focus assist, and Teams in-app settings to reach the user

Microsoft Teams

How to Fix Microsoft Teams Notifications Not Working

Teams notifications not working? Fix missing alerts and sounds by checking Windows Focus assist, the Teams notification style, per-channel settings, and Do Not Disturb.

MCSA Guru Team Sep 10, 2026 7 min read

Cover showing one Microsoft 365 mailbox receiving mail at several alias addresses that all point to the same inbox

Microsoft 365 & Exchange

How to Add an Email Alias in Microsoft 365

Add an email alias in Microsoft 365 using the admin center or PowerShell. Learn aliases vs primary address, sending from an alias, and the proxy address rules.

MCSA Guru Team Sep 9, 2026 8 min read

Cover showing a source domain controller being rejected by a target DC during a Kerberos-authenticated replication bind, with an Access Denied stamp

Windows Server & Active Directory

How to Fix Active Directory Replication Error 5: Access Denied

Diagnose and fix Active Directory replication error 5 (Access is denied) — from Kerberos and time skew to RPC sealing policy, secure channel, and UDP fragmentation.

MCSA Guru Team Sep 8, 2026 7 min read