This proof of concept was built around a simple question: Which contractors are we working with the most and who is communicating the most between these companies?

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Email metadata was extracted from the Microsoft Graph API and stored in a custom database for analysis. The data model for the graphing tool was built by subsetting the email domains for top contractors to isolate emails from/to those organizations and our internal addresses. We started with a list of 10 contractors, and added several more based on global analysis of the entire dataset.