Microsoft Outlook 365 Outage Costs $100,000 An Hour As 4 Million Businesses Hit

Published by

Anjali Belgaumkar

November 13, 2026

Hand holding torn financial chart split between green growth and red crash

The global Microsoft 365 outage could be costing businesses billions of dollars, with professional services firms among the hardest hit, according to RSM Australia risk advisory partner Ashwin Pal. In an interview with ABC, Pal estimated that for professional services, the disruption costs more than $100,000 for every hour Outlook, Teams and other Microsoft apps remain down. The outage began around 3:15 am Sydney time on Friday and has now stretched to roughly 13 hours. With nearly 4 million businesses worldwide relying on Microsoft’s office software, total losses are likely to run into the billions, ABC News reported. Small businesses are expected to suffer the most, since many depend heavily on email and lack backup systems to keep working. Microsoft has not yet given a timeline for full recovery, and its next update is due at 12:30 pm IST.

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