You support a customer who is upgrading from Lync 2010 Group Chat to Lync 2013 Persistent Chat. Users are Session Initiation Protocol (SIP) enabled members of a single Active Directory Domain…

You support a customer who is upgrading from Lync 2010 Group Chat to Lync 2013 Persistent Chat. Users are Session Initiation Protocol (SIP) enabled members of a single Active Directory Domain Services (AD DS) domain. Group Chat clients connect by using a well-known user named [email protected]. The Lookup service registers with the Lync server to receive incoming requests. Your customer's Persistent Chat pool fully qualified domain name (FQDN) is named pchatpool.litwareinc.com. When users sign out of Lync and then sign in again by using the Lync 2010 Group Chat client, they are able to access their data without needing to change any configuration. You need to configure Lync Server 2013 persistent chat to support legacy Group Chat clients. Which cmdlet should you run?