Which Cisco Unified communications manager configuration is required for SIP MWI integration?

Which Cisco Unified communications manager configuration is required for SIP MWI integration?
A . Select “Redirecting Diversion Header Delivery C Inbound” on the SIP trunk.
B . Enable “Accept presence subscription” on the SIP trunk security profile.
C . Select “Redirecting Diversion Header Delivery C outbound” on the SIP trunk.
D . Enable “Accept unsolicited notification” on the SIP Trunk security profile.

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Answer: D