Windows
Storage Spaces Direct / S2D - Disks stuck in maintenance mode
Having a storage space direct cluster stuck in storage maintenance mode feels quite unlucky. Luckily we've fond a way to fix this!
Exchange database fails with serious I/O error
Running exchange servers there's a slight chance that the database growth results in a state where the filesystem cannot allocate anymore segments. Let's fix this.

Change BIOSGUID in Hyper-V machines
Using templated virtual machines on hyper-v comes with some issues if you need to ensure that each VM has a unique identity. This guide will show how you'll assign a unique identity for linux VMs.

git on windows on CA's without crl (mostly pki)
If you're working with git and are using certificates without revocation lists on windows this article shows how you can disable ssl revocation checks on git client.

Performance issue with hyper-threading
On some of our setups we had an issue with VM to VM latencies (no the same host) ranging between 1000-2000ms. This article will describe the issue and how we solved it.

Relocate pagefile using powershell
This short guide explains how to set pagefile configuration using powershell.

Scripting: FTP Upload behind a firewall
WinSCP - a small tool to connect to a ftp server in passive mode.

openvpn 2.5 - using wintun
Starting with release 2.5 openvpn added support for wintun interfaces. To enable utilization of wintun interfaces, you need to make some adjustments.