According to the PMBOK Guide, the stakeholder register is an output of the Identify Stakeholders process, and it contains information about the project stakeholders, such as their identification, assessment, classification, and engagement levels1. The communications management plan is an output of the Plan Communications Management process, and it describes how the project information will be managed and communicated among the stakeholders, such as the communication requirements, methods, formats, frequency, roles, and responsibilities2. Whenever there is a change in the project team or the stakeholder environment, the project manager should update the stakeholder register and the communications management plan accordingly, to ensure that the new team member or stakeholder is properly identified, analyzed, and engaged3. In this case, the project manager should include the new team member in the stakeholder register and update the communications management plan to reflect the team member's communication preferences, such as working remotely and being more responsive in face-to-face interactions. This will help the project manager to plan and manage the project communications more effectively and efficiently, and to avoid potential misunderstandings, conflicts, or delays45. References: 1:
PMBOK Guide, 7th edition, page 215 2: PMBOK Guide, 7th edition, page 237 3: PMBOK Guide, 7th edition, page 217 4: Project Team Communications4 5: How to create a project management communication plan5