A co-managed IT responsibility matrix gives an internal IT team and its external provider one documented view of ownership. This guide explains how to assign help desk, infrastructure, Microsoft 365, cybersecurity, backups, vendors, projects, escalation, reporting, and continuity tasks without creating duplicated effort or unattended gaps. It includes a practical RACI-style method, questions for leadership, transition steps, review triggers, and service-boundary examples. Orange County organizations can use the framework to preserve internal knowledge while adding specialist capacity, after-hours coverage, operational consistency, and accountable follow-through. Use it before a co-managed engagement, during onboarding, or whenever staffing, systems, risks, vendors, or business priorities materially change. ... ... Read More