The official document has no instruction about this question.
It only said that Lync Server 2013 supports virtualization topologies that support all Lync Server workloads, including instant messaging (IM) and presence, conferencing, Enterprise Voice, Monitoring, Archiving, and Persistent Chat.
For more information, please refer to this article: https://learn.microsoft.com/en-us/lyncserver/lync-server-2013-running-lync-server-on-virtual-servers.
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