The creation of a new department and the request from its manager to be involved in project communications necessitates a review and potential update of the communications management plan. According to best practices in project management, when there are changes in the organizational structure or new stakeholders emerge, it is important to perform a stakeholder analysis to understand their needs and expectations. This analysis will inform any necessary updates to the communications management plan to ensure that all relevant parties are included in the communication cycles, and that the information flow remains effective and aligned with the project's objectives123.
References: (Professional in Business Analysis Reference Materials source and documents)123.