Direct Booking does not successfully book a resource in Outlook 2010

The Microsoft support article entitled Direct Booking does not successfully book a resource in Outlook 2010 discusses how to solve a problem booking resources in Outlook 2010. The following PowerShell one-liner will fix the problem:

New-ItemProperty "HKCU:\Software\Microsoft\Office\14.0\Outlook\Options\Calendar" EnableDirectBooking -Value 1 -PropertyType DWORD