Features of an advanced travel booking engine for corporate clients include:

. Integrated Expense Management: Includes tools for managing and tracking travel expenses, receipts, and reimbursements.

. Policy Compliance Tools: Ensures compliance with corporate travel policies by integrating policy rules and guidelines into the booking process.

. Advanced Reporting Capabilities: Provides detailed reports and analytics on travel spending, booking trends, and policy adherence.

. Customizable Booking Options: Offers flexible booking options to accommodate corporate travel needs and preferences.

. Support for Multiple Users: Allows multiple users with different roles and permissions to access and manage travel bookings.

Overall, integrated expense management, policy compliance tools, advanced reporting capabilities, customizable booking options, and support for multiple users are key features of an advanced travel booking engine for corporate clients.