Using Microsoft Bookings to Support Creative & Niche Websites

Unfortunately, Microsoft Bookings doesn’t currently provide a native way to block or filter email domains directly in the booking form logic.

Power Automate to Auto-Cancel Based on Email Domain

Set up a Power Automate flow that:

• Triggers when a new booking is made
• Checks the customer email domain
• Sends a cancellation email if the domain matches a list (e.g., gmail.com, hotmail.com)
• Optionally deletes the event or sends an alert to staff

You can do this by connecting the Bookings connector (via Graph API) or monitoring the calendar events in Outlook.

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