Because the management of the top-level shared calendar has been distributed, with each individual team controlling its own events and content, managing the overall solution will be fairly simple. By design, the solution is set up around roles that will help the process run smoothly and restrict access to those who should have access.

This solution has not touched on look and feel. There are many options for design and further configuration based on the level of activity on your activity site and the need to closely mirror the look and feel of your corporate environment. But from a management standpoint, this solution should give you what you need to build a centralized calendar, with minimal management needed on an ongoing basis.