Skip to content
root@hiddenobelisk:~$ tail -f /var/log/braindump.log▍ online --:--:-- UTC

Hidden Obelisk

Real-world solutions for system administrators

Author: Dmytro Poliakov

Infrastructure "Engineer" and self-proclaimed MLOps Hazard. I specialize in keeping Windows Server, AD, and Exchange "stable" by permanently muting all monitoring alerts and testing exclusively in production. Recently, I’ve expanded my chaos from SysOps to MLOps by shoving local AI servers into our infrastructure. Now, instead of manually ignoring your IT tickets, I use a high-RAM on-prem LLM to automatically gaslight you about DNS issues and hallucinate reasons why your mailbox is empty

Exchange 2016: Recovering a Single Mailbox from an EDB Backup Using a Recovery Database

June 12, 2026~9 min read0 comments

The Problem A shared mailbox used by several departments turned up almost empty. The owner opened it in OWA and found two messages where there used to be months of correspondence. Nobody admitted to deleting anything, and the deleted item … cat full-post.md →

  • MS Exchange

Exchange OWA Inline Images Disappeared After May 2026: Root Cause and Fix

May 19, 2026~8 min read10 comments

Last updated: May 20, 2026 ⚠️ Update May 20, 2026: If images are broken in classic Outlook desktop (not OWA) — this is a separate Microsoft bug introduced in build 19929.20164+, unrelated to EEMS. See the Outlook Desktop Bug section … cat full-post.md →

  • MS Exchange

Exchange 2016 CU Upgrade Fails: Fixing Virtual Directory Errors Step by Step

May 14, 2026~7 min read0 comments

The Problem You are upgrading Exchange 2016 to CU23 and the installer keeps failing at “Mailbox role: Client Access service” with errors like these: Or: Every time you fix one error and re-run Setup, it fails on a different virtual … cat full-post.md →

  • MS Exchange

Exchange 2016 OWA HTTP 500 After Auth Certificate Expiry: Complete Recovery Guide

May 12, 2026~5 min read0 comments

The Problem One morning users start complaining they cannot access OWA. Outlook shows “Trying to connect…” and never connects. You open the browser and see: Or worse: an ERR_TOO_MANY_REDIRECTS loop that never stops. You RDP into the server. All Exchange … cat full-post.md →

  • MS Exchange

DeepSeek V3.2 on CPU: Fixing the “Missing Opening Tag” Glitch

April 24, 2026~1 min read0 comments

I hit a weird bug: the model’s “thinking” process starts correctly, but llama.cpp seems to “eat” the opening <think> tag. You only get the closing </think> at the very end. Because of this, Open WebUI fails to collapse the reasoning … cat full-post.md →

  • AI Lab

Client Push Failures: A Log-Driven Troubleshooting Guide for ConfigMgr

April 14, 2026~7 min read0 comments

When a Client Push fails, the console rarely tells you why. It aggregates status, masks transport-layer rejections, and leaves you guessing. If you’re still relying on high-level compliance states or waiting for a retry cycle, you’re adding noise to an … cat full-post.md →

  • Endpoint Management

Exchange 2016: Mapping Secondary Mailboxes in OWA (Classic UI)

April 7, 2026~4 min read0 comments

⚠️ Exchange 2016 reached End of Support on October 14, 2024. This guide covers legacy on-prem scenarios. For modern environments, review Exchange Online mailbox delegation and OWA365 unified inbox features. Admins frequently run into the same user complaint: “Outlook desktop … cat full-post.md →

  • Helpdesk

Detecting Portable and Unauthorized Software with PowerShell and GPO

April 4, 2026~7 min read2 comments

In most enterprise environments, software inventory is treated as a solved problem. Tools like Microsoft Endpoint Configuration Manager (MECM/SCCM), Intune, or even basic registry parsing are deployed, tuned, and assumed to provide complete visibility. But inventory tools only report what … cat full-post.md →

  • Windows Server

Deploy Trusted Root Certificates via GPO (Step-by-Step Guide)

April 2, 2026~3 min read0 comments

When working in a Windows domain you will eventually face a situation where all machines need to trust a specific certificate. This can be an internal PKI a proxy with SSL inspection or internal services using custom TLS certificates. Installing … cat full-post.md →

  • Windows Server

From Office 2016 to Modern Click-to-Run: A Practical Migration Approach Using Volume Licensing in Enterprise Environments

April 1, 2026~7 min read0 comments

When working with legacy Office deployments, I recently set up a temporary lab environment to better understand how older Volume Licensed versions like Office 2016 behave on modern systems such as Windows 11. The goal was not production use, but … cat full-post.md →

  • Endpoint Management

Posts pagination

1 2 3 next →

Categories

  • AI Lab
  • Endpoint Management
  • Helpdesk
  • Legacy
  • MS Exchange
  • Windows Server
NORMAL⋔ main © 2026 Hidden Obelisk · uptime: forever · powered by caffeine & cron utf-8 · LF · :top ↑