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

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Placement

A Director pool should be located where the majority of the user base exists because it is the initial point of sign-in for all users. It makes sense to place a Director in a datacenter with a Front End pool, but it’s unnecessary to use a Director in branch offices with small user counts.

Another recommendation when planning for placement is to use a Director in any location where an Access Edge Server role exists. As unauthenticated traffic from the Internet passes to the internal network, the Director is a short hop away from the Edge Server and can authenticate the traffic quickly. If the Director is in another location, traffic from an Edge Server has to traverse a WAN connection before being authenticated.

Note

In remote locations ...

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