Your company has a Skype for Business Server 2015 infrastructure and a Microsoft Exchange Server 2013. The Skype for Bus

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Your company has a Skype for Business Server 2015 infrastructure and a Microsoft Exchange Server 2013.
The Skype for Business Server 2015 infrastructure has Enterprise Voice enabled and uses a global four-digit dial plan.
The Exchange Server organization has Unified Messaging (UM) enabled and uses a four-digit UM dial plan named DialPlan1. All dialing restrictions are set to allow All.
You need to ensure that only the users in the research department can use the Play on Phone feature.
Which two actions should you perform? Each correct answer presents part of the solution.

A. Create a new hunt group.
B. Modify the default UM mailbox policy.
C. Modify DialPlan1.
D. Create a new UM mailbox policy.
E. Create a new UM dial plan.