The first priority for a PM inheriting a project midstream is to access and review the existing project artifacts---the documented ''source of truth'' that shows what was approved, what has changed, current status, and remaining work. CompTIA Project+ emphasizes maintaining project documentation and artifacts, and it explicitly includes ''Review existing artifacts'' as a key activity as a PM gets oriented to the project context.

By reviewing artifacts (charter, scope baseline/WBS or backlog, schedule, budget, risk register, issue log, change control log, stakeholder list, communication plan, testing/quality plans, and current reports), the PM can quickly understand: current phase, constraints, commitments, open risks/issues, and what decisions have already been made. That enables accurate next actions and prevents contradictory communication or rework.

A brainstorming session (B) is not the best ''first'' step without understanding current constraints and decisions. A kickoff meeting (C) is typically for initiation; mid-project, the PM may run a transition meeting later, but only after reviewing the facts. Establishing communication channels (D) is important, but you can't communicate effectively until you know the baseline status and existing governance approach---information found in the artifacts.