Namecheap account locked after an ID check: why every domain went down
A long-time Namecheap customer says his account was locked after he missed a single ID-verification email, and every domain in it stopped working, i…
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Intune Assignment Filter Not Working: A Read-First Filter Evaluation, Include/Exclude, and Property Triage
Helpdesk: "We put an assignment filter on the Wi-Fi profile so only corporate Surface devices get it. Half the Surfaces still don't have Wi-Fi, and…
AADSTS50105 User Not Assigned to a Role for the Application: A Read-First Enterprise App Assignment Triage
Helpdesk: "Finance can't open the new expense app. Red page says AADSTS50105, the signed in user is not assigned to a role for the application. IT a…
Entra Seamless SSO Not Working: A Read-First Intranet Zone, Kerberos Ticket, and AZUREADSSOACC Triage
Helpdesk: "Outlook on the web used to just open on my desk PC. Now it asks for my password every morning." A second ticket from the same floor: the…
Intune Microsoft 365 Apps Not Installing: A Read-First MSI, CDN, and Office CSP Error Triage
Helpdesk: a Required Microsoft 365 Apps assignment sits on Install pending or Waiting for install status for hours. Another device shows Failed . Ou…
Entra Connect Sync Errors Detected: A Read-First Duplicate Attribute, Soft Match, and 8344 Permission Triage
The daily email says Microsoft Entra Connect sync errors detected . Connect Health lists an AttributeValueMustBeUnique on a new hire's proxyAddresse…
Intune Configuration Profile Error 65000 or Conflict: A Read-First Per-Setting Status and MDM Event Log Triage
A Windows device shows your Intune configuration profile as Error , and the per-setting detail says 65000 or 0x87D1FDE8 (Remediation failed) . Anoth…
Intune App Protection Policy Not Applying: A Read-First License, Targeting, and Check-In Triage
You assigned an Intune app protection policy (APP, also called MAM) for iOS/iPadOS or Android. Outlook still lets the user copy mail into a personal…
Intune Remediation Script Not Running: A Read-First Exit Code, Context, and HealthScripts.log Triage
You wrote a detection script and a remediation script, uploaded them as a script package under Devices > Manage devices > Scripts and remediat…
Clean Shutdown and Restart Order for a Small Office in a Texas Grid Emergency
A small office survives a Texas grid emergency by shutting down cleanly before the power drops and restarting in dependency order after it returns.…
"Your Organization Has Disabled This Device" (AADSTS135011): A Read-First Entra Device Triage
A user opens Outlook or Word and gets "Something went wrong. Your organization has disabled this device. To fix this, contact your system administra…
AADSTS53003 Blocked by Conditional Access: A Read-First Sign-In Log Triage
A user forwards a screenshot: "You cannot access this right now" and, under More details , AADSTS53003: Access has been blocked by Conditional Acces…
BitLocker Recovery Key Missing from Intune or Entra: A Read-First Escrow Triage
Helpdesk has a locked laptop and a recovery prompt. You open Intune admin center > Devices > [device] > Recovery keys (or Entra admin cente…
Entra ID Break-Glass Accounts: Best Practices After Mandatory MFA
A lot of tenants still have the same break-glass setup: one cloud-only Global Admin, a long password in a safe, and "excluded from MFA" written on t…
One firewall command, one locked server
One firewall command, one locked server Fresh VPS. Doing everything right — hardening the box before it went live. SSH keys installed, updates appli…
How We Built a 200-User Office Network in Three Weeks
A financial firm was moving into a full floor in Midtown Manhattan. More than 200 people would sit down on opening day and expect the wired ports, t…
Does a shared mailbox need a license? The Exchange Online limits that decide it, plus a read-only audit
Does a shared mailbox need a license? The limits that decide it Shared mailboxes are the standard answer for info@, billing@, and the mailbox of som…
Exchange Online "mailbox full" but the online archive isn't helping - a read-first troubleshooting guide
Exchange Online "mailbox full" but the online archive isn't helping The ticket says: "Outlook says my mailbox is full. IT turned on the archive last…
I built a VS Code extension for working with remote servers without VS Code Server
I've been working on a VS Code extension called Remote Edit for the past few months. It began as a way to work with FTP/SFTP from inside VS Code, an…
Computer inventory software: how to choose
Once an office has more than twenty computers, an Excel spreadsheet can't keep up with reality, and you need computer inventory software. There's pl…
CMD Is Underrated for One Job: Dead-Simple File Ops on Locked Machines
PowerShell is the right default for automation on modern Windows. I’m not here to argue otherwise. I am here to argue that CMD still owns one narrow…
Self-hosting break-even: $23/month of SaaS, a $170 mini PC, about 9 months
Replacing $23/month in SaaS subscriptions (Google One 2TB + 1Password + Plex Pass) with a $170 mini PC drawing 15W idle breaks even in about 9 month…
Disk full? broot's whale-spotting mode plus Ctrl-G turns your cleanup into one command
Every engineer knows the disk-full afternoon. The build or the backup job fails, and you end up in the same loop using du -sh and rm : du -sh * / |…
Hardening SSH access
After the initial setup we harden the SSH access – the most important door to your server. What are we building? By the end you log in with an SSH k…
Five layers, one migration — what a fabric cutover exposed about storage
The plan was a network change with a storage flavour. Move a Windows workload and two TrueNAS servers off the legacy flat network and onto the new d…
unattended-upgrades: automatic security updates for Debian
"Remember to install updates weekly" – this sentence from the maintenance sections of the other tutorials is the first one people forget. That's exa…
Debugging a 6-Second JVM Death Loop: A Bytecode Decompilation Story
The Symptom A secondary server in a High Availability (HA) failover cluster kept dying. Not crashing loudly — dying quietly , exactly 6-7 seconds af…
For Months My Dev Server Came Up on 3001. Tonight I Found Out Who Had 3000.
A listener nobody remembered starting held port 3000 on my own machine since spring. One ss flag named the owner without root — and showed why 'list…
Promoting a Member Server to Domain Controller, Transferring FSMO Roles, and Configuring Active Directory Sites
Introduction Active Directory is essential in organizations where users, servers, and network resources must be centrally managed and securely contr…
Your DHCP server is handing out addresses it never checked
Tested on Windows Server 2025 (24H2, build 26100.33296) A machine boots, gets a 169.254.x.x address, and has no network. The DHCP server is up. The…