I am preparing the planning phase of a large ERP implementation, run under MS Project Professional 2016. We intend to run one Masterplan owned by a central PMO and each of the 11 SubProjects being owned by each SubProject-Lead, running their sub-project in their OWN MS Project Professional instance. Q: 1. If I set up all Subprojects first, then tying them all into a MasterPlan, how do we ensure we will have up-and-downstream sync when changes are being made in the Master or SubProject-Plan for the respective SubProject Workpackages or Resources? 2. For this to work, do all 12 Projectplans (1 Master, 11 SubProject) have to reside in ONE place? Currently the plan is to run have them reside on Sharepoint, in the overall organization Office365 environment. THANKS FOR YOUR ADVICE.