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. The internal split-DNS domain contoso.com contains the following records:
_gc._tcpSRV
priority 0, weight 100, port 3268 dc1.contoso.com_ldap._tcpSRV
priority 0, weight 100, port 389 dc1.contoso.com_kerberos._tcpSRV
priority 0, weight 100, port 88 dc1.contoso.com_sipinternal._tcpSRV
priority 0, weight 0, port 5061, lync.contoso.com _sip._tlsSRV
priority 0, weight 0, port 5061, lync.contoso.com EnterpriseCA
A
192.168.10.5Admin
A
192.168.10.10Lync A
192.168.10.10Lyncdiscoverinternal
A
192.168.10.10Exchange2010
A
192.168.10.4OWA
A
192.168.10.4DC1
A
192.168.10.3Sip
A
192.168.10.10
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.
Reconfigure Dynamic Host Configuration Protocol (DHCP) option 120 to point to
DC1.contoso.local.

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

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

D.
Create the following host record in DNS: Autodiscover.contoso.com A 192.168.10.4

Explanation: