Disaster Recovery Reference Hub
Written by a senior engineer from real incident work. These guides target the searches that happen when something is broken right now — not marketing copy.
Domain controller down? Senior engineer's step-by-step guide to diagnosing, recovering, or replacing a failed DC — with the commands, the pitfalls, and when to stop.
⏱ 12 min read · Read guide → Cyber Incident ResponseRansomware on your network? UK senior engineer's first-4-hours playbook — what to do, what NOT to do, and your ICO, NCSC and Action Fraud obligations.
⏱ 14 min read · Read guide → Server EmergenciesHyper-V host down or unstable? Senior engineer's recovery guide — diagnose the host, recover the VMs, fix orphaned VHDX, and stop the same fault recurring.
⏱ 12 min read · Read guide → Active DirectoryUsers can't log in? Senior engineer's systematic guide to diagnosing AD authentication failures — secure channel, time skew, DNS, replication — with the commands to use.
⏱ 11 min read · Read guide → Microsoft 365 & AzureMicrosoft 365 Conditional Access has locked you out? Senior engineer's recovery guide — break-glass accounts, sign-in log forensics, and how to disable the offending policy.
⏱ 9 min read · Read guide → Network & VPNBusiness VPN not connecting? Senior engineer's vendor-neutral diagnostic checklist — SSL VPN, IPsec, Always-On — covering Fortinet, Meraki, SonicWall and WatchGuard.
⏱ 11 min read · Read guide → Backup FailuresVeeam backup jobs failing? Senior engineer's diagnostic guide — VSS errors, repository issues, retention failures — and how to verify your backups before disaster strikes.
⏱ 11 min read · Read guide → Active DirectorySenior engineer's step-by-step guide to seizing FSMO roles from a failed domain controller — when to seize vs transfer, ntdsutil procedure, and the critical post-seizure rules.
⏱ 10 min read · Read guide →The Triage Manual
Hundreds of triage-grade entries across 12 IT domains — error codes, diagnostic steps, PowerShell, and recovery procedures. The deeper companion to these guides.
Browse the library →Need this resolved now rather than read about it?
📞 Call 01923 372471 — senior engineer answers directly