Which feature is exclusive to Voicemail Pro and not available in Embedded Voicemail?

Voicemail Pro offers advanced features beyond Embedded Voicemail, including customizable call flows (Option B). This allows administrators to create complex IVR menus and conditional routing using the Voicemail Pro graphical editor, which Embedded Voicemail lacks. Option A (Auto Attendant) and Option C (Hunt Group Announcements) are supported by both systems, though Voicemail Pro offers more customization. Option D (Mailbox greetings) is a basic feature available in both.References: Avaya IP Office Voicemail Pro Administration Guide, Embedded Voicemail UserGuide.