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Microsoft® Lync Server 2010 Unleashed by Tom Pacyk, Andrew Abbate, Alex Lewis

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High Availability

When adding high availability to a Lync Server Edge Server deployment, an organization must make a decision about how it will provide load-balancing features. The only options available for load-balancing Edge Servers are to use DNS-based load-balancing or to leverage a hardware load-balancing solution.

Note

Windows Network Load Balancing (NLB) is not supported for load balancing any of the Lync Server roles, including Edge Server features.

DNS load balancing seems like an attractive feature at first, but does have some limitations. Organizations should review these limitations and then make a decision about whether a hardware load balancer is required. The main limitation of DNS load balancing is that it does not work with ...

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