Reply from Cal.com, IncApr 4, 2025
Hi there,
We’re truly sorry to hear about your experience, and we appreciate you taking the time to share such detailed feedback — especially since you clearly gave the product a fair shot and wanted it to work.
You're right that Microsoft Teams integration has been frustrating lately. The issue you encountered stems from changes on Microsoft’s end around authentication tokens, which unfortunately disrupted many third-party integrations, including ours. It worked reliably until recently, and we understand how disruptive this has been. We’re actively working with Microsoft to resolve it, but progress has been slower than we’d like.
The reminder issue you mentioned is especially concerning, and we’d love to investigate that further. Our system is designed to send out both email and (optionally) SMS reminders, and if that's not happening, we want to get to the bottom of it.
While we believe Cal.com offers a lot of flexibility and power that goes beyond what Microsoft Bookings provides, we fully respect your decision to switch if reliability is what you need most right now. That said, if you ever decide to give it another shot, we’d be more than happy to personally assist in setting things up and ensuring everything runs smoothly.
Thanks again for your honest feedback, and we hope we can win back your trust in the future.