Microsoft Bookings SMS Fail f your organisation uses Microsoft Bookings  and clients aren’t receiving SMS reminders, you’re not alone. Many Australian users have discovered that text notifications fail  when mobile numbers are entered using local format — for example: 0402 777 253 ✅ +61 402 777 253 It’s a small difference with big impact — and here’s why. What’s Actually Happening Microsoft Bookings sends SMS notifications using Azure Communication Services (ACS)  — Microsoft