Second Quarter Fiscal 2019 Earnings

Q2 Fiscal 2019 Business Highlights Continued Success in Mid-Market and Enterprise: 27 Large Enterprise Deals (>$10,000 in MRR) - more than doubled in new large deals closed year-over-year Service revenue from customers billing (>$1,000 in MRR) grew 30% year-over-year and represents 61% of total service revenue, excluding DXI and adjusted for constant currency Service revenue from customers billing (>$10,000 in MRR) grew 60% year-over-year and represents 28% of total MRR, excluding DXI and adjusted for constant currency New monthly recurring revenue (MRR) booked from customers increased ~50% year-over- year and comprised 65% of total bookings Marquee customer wins include Condé Nast and Toll Brothers Integrated UCaaS & CCaaS (System of Engagement) Continues to Resonate: ~80 customer deals including 8 of the top 10 deals were combination deals 5 8x8

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