Added Teams deployment + HIPAA-appropriate configuration as a tracked gap (hipaa.md #27) and M365 issue (m365.md #14). Cites transmission security + BAA requirements and outlines controls needed (retention, DLP, external sharing lockdown, guest access, meeting consent). Dependency on Microsoft BAA flagged. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>