In the integration of Cisco Unity Connection using SIP, which SIP trunk security profile option is required for MWI to work correctly?
A . Accept out-of-dialog refer
B . Accept replaces header
C . Accept unsolicited notification
D . Accept presence subscription
Answer: C
Explanation:
Reference: https://community.cisco.com/t5/collaboration-voice-and-video/understanding-troubleshooting-mwi-on-unity-connection/ta-p/3162948