A Fortune 500 healthcare provider faced a HIPAA investigation requiring production of 20 million messages across 10,000 employees. Their Microsoft Teams deployment became a liability:
Cloud storage risks: Third-party servers exposed PHI to accidental leaks
Data retrieval chaos: Legal teams wasted 1,000+ hours (cost: $500K) recovering messages
Catastrophic fines: $17.5M total impact from HIPAA penalties ($2M), revenue loss ($10M), and settlements ($5M)