You support a customer who administers Microsoft Lync Server 2013 Enterprise servers in his
company. The pool named lync.contoso.com is configured with the session initiation protocol (SIP)
domain contoso.com.

Users who are running Lync Mobile on their mobile devices report that when they attempt to
retrieve calendar information, they receive an error that references a Microsoft Exchange Web
Services connectivity issue. You need to ensure that users are able to receive calendar information
from Lync Mobile devices. What should you do?

A.
Create the following service record in DNS:
_lyncdiscover._ccp.contoso.com SRV Priority 0, weight 0, port 5061, Lync.contoso.com

B.
Create the following host record in DNS:
Autodiscover.contosc.com A 192,168.10.4

C.
Reconfigure Dynamic Host Configuration Protocol (DHCP) option 43 to point to
EnterpriseCA.contoso.local.

D.
Reconfigure Dynamic Host Configuration Protocol (DHCP) option 120 to point to
DC1.contoso.local.