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Microsoft® Lync® Server 2013 Unleashed Second Edition by Randy Wintle, Alex Lewis, David Ross, Tom Pacyk

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File Share High-Availability

Microsoft recommends deploying file servers configured with Distributed File System (DFS) to provide high-availability of Lync Server file shares. DFS has been tested to support failover between file servers in the same datacenter. Although DFS itself can support replication across multiple sites, for Lync it is recommended that DFS be used only for redundancy in the site.

RTO and RPO for File Share DFS

DFS is considered best-effort for file replication. Because of this, there is no published RTO objective or RPO commitment. The failover tends to happen quickly, but data replication can prevent a seamless transition. The Lync file share is used for address-book data, as well as conferencing data that is uploaded. ...

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