This case study details the migration of a global consumer health and hygiene product company from legacy voice systems to Microsoft Teams Voice. The company, which has a user base of 40,000 employees across 63 countries, faced an urgent deadline due to the expiration of their contract with the current national voice provider. The immediate focus was on replicating existing phone capabilities, including fax and analog infrastructure. The study outlines the challenges of meeting a tight timeline while ensuring a solution that could support both the initial phase in the US and future global expansion. BCM One's Pure IP Enterprise Voice offering was selected due to its ability to meet the sophisticated requirements and deployment needs within the specified timeframe. The successful migration of the initial users onto the Teams platform was completed in about four months, leading to significant cost savings. The ongoing global rollout is strategically planned based on contract dates with remaining carriers.