Expert IT Leadership Blogs

A disaster recovery plan that has never been tested is a document, not a capability. This guide covers all four testing levels — tabletop exercises, walkthrough tests, functional simulations, and full-scale failover tests — what each involves operationally, how to build a testing calendar, and how to use post-test documentation with auditors and cyber insurers.

Over 90% of mid-size enterprises report losing more than $300,000 per hour during an outage, per the ITIC 2024 Hourly Cost of Downtime Survey. An IT disaster recovery plan isn't a binder on a shelf — it's a tested, role-assigned set of procedures that defines exactly what happens in the first minutes of an incident. This article walks through a 14-step DR framework: supply chain dependencies, business function tiering, risk assessment, BIA, backup strategy (3-2-1 rule), RPO and RTO definitions, cyber insurance, emergency response team structure, and why annual testing is what separates a functional plan from a liability.

Microsoft guarantees 99.9% uptime for its applications — not your data. Under the Shared Responsibility Model, Microsoft is not responsible for data lost through user deletion, ransomware encryption, account compromise, or policy violations. Exchange has a 30-day default retention window. SharePoint and OneDrive recycle bins hold content for 93 days. Once those windows close or an account is deleted, the data is gone — there is no Microsoft-managed backup to call. This article explains the shared responsibility model in detail, what Microsoft Defender and Purview do and don't cover, and how third-party backup platforms like Veeam, Acronis, and Datto address the gaps.