MyVoice

Call transfer number. When a caller is put through to your Voicemail, they are given the option of being transferred to the number set by your business group administrator and specified here.
Provide caller ID for incoming calls. Controls whether information about callers is delivered to your phone.
Provide caller name for incoming calls. Controls whether caller names are delivered to your phone when they are available.

These options apply when configuring Call Forwarding via your telephone rather than via this web page.