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NEW QUESTION 117
You support a customer whose network environment includes Skype for Business Standard deployed with an Edge Server that is connected to the Internet. All users have Skype for Business Mobile installed on their Windows phones. Users report that they receive instant messages only when the Skype for Business Mobile app is active in the foreground. You need to ensure that mobile users are able to receive instant messages at all the times. Which two actions should you perform? (Each correct answer presents part of the solution. Choose two.)

A.    Enable Push Notifications and Federation from the Skype for Business Server Management Shell.
B.    Set up hosting provider federation between your organization and the Push Notification Service at Skype for Business Online.
C.    Upgrade the Lync 2010 Mobile add on the Windows mobile devices.
D.    Install the Skype for Business Mobility components on the Edge Server.
E.    Open port 5223/TCP outbound on the company firewall.

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NEW QUESTION 120
You have a Skype for Business Server 2015 infrastructure. The infrastructure contains one central site. The infrastructure contains a Standard Edition server that has the Mediation Server role installed and is located in the central site. You configure a trunk to an IP-PBX which is qualified for integration with Skype for Business. You have 300 users who are enabled for Enterprise Voice. You need to provide public switched telephone network (PSTN) services to the Enterprise Voice users if the IP-PBX fails. What should you do?

A.    Install a Survivable Branch server that connects directly to the PSTN.
Configure a new trunk and add the trunk to the existing route.
Add the route to the PSTN usage and add the PSTN usage to the voice policy.
B.    Install a PSTN gateway that connects directly to the PSTN.
Configure a new trunk to the new PSTN gateway.
Create a new route and a new PSTN usage.
Add the route to the PSTN usage and add the PSTN usage to the voice policy.
C.    Install an additional IP-PBX that connects directly to the PSTN.
Configure the existing trunk to use both IP-PBXs in resiliency mode.
D.    Install a new trunk to a certified SIP trunk provider.
Add the trunk to the existing PSTN usage.
Add the PSTN usage to the voice policy.