MIS security measures, tools, and strategies

Assume that you have been asked to consult for a company that has branch offices in four continents. You have implemented a management information system that will enable its managers to exchange information about various company activities in the areas of marketing, sales, HR, finance, and administration. As part of the implementation process, you are required to make a recommendation on the types of security measures that should be taken with implementation of this system.

What are some of the potential security threats to managing information related to these activities across multiple locations?

What strategies or tools could be used to minimize these types of threats upon implementing a system in this situation?