Lync Server 2010 requires a file share for several services including the address book service, conferencing data and device update files. The file share is supported on either Direct Attached Storage (DAS) or a Storage Area Network (SAN), including Distributed File System (DFS), and on a Redundant Array of Independent Disks (RAID).

Lync Server 2010 supports the use of a shared cluster for the file shares in the Lync deployment. If a shared cluster for the file shares is used in the Lync deployment, the Cluster Administrator should be used to create the file shares.