Which two actions should you perform?

You support Skype for Business Server 2015 servers in your customer’s company network. You enable federation with Skype for consumers. Users of Skype for consumers are unable to participate in instant messaging (IM) conversations in your customer’s organization. You need to ensure that the users of Skype for Business clients are able to participate in IM conversations.

Which two actions should you perform? Each correct answer presents part of the solution.
A . Enable partner domain discovery.
B . Create a SIP federated provider.
C . Create an external access policy.
D . Enable an archiving disclaimer to federated partners.

Answer: B, C