[A3] You purchase a Microsoft Office 365 subscription and configure the pilot users to use the @contoso.onmicrosoft.com UPN suffix. You need to ensure that the pilot users can perform the following actions:
. Join meetings.
. Use a SIP address that has the @online.contoso.com suffix.
. Communicate with users who are hosted on Lync Server 2013.
Which three tasks should you perform? (Each correct answer presents part of the solution. Choose three.)
A. From the Lync Online Control Panel, set up federation to contoso.com.
B. From the Lync Server Control Panel, set up federation to online.contoso.com.
C. From the Lync Server Control Panel, set up federation to contoso.onmicrosoft.com.
D. From the Lync Server Control Panel, update the user SIP addresses of the users to @online.contoso.com.
E. From the Lync Online Control Panel, update the SIP addresses of the users to @online.contoso.com.
