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

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Internal Extensions

Many times organizations will not offer DID numbers to users, or might assign DIDs to only some users. In this case, the remaining users only have an internal extension defined. This is a completely acceptable deployment option with Lync Server 2010, but there can be some confusion as to how the telephone URI should be assigned to user accounts.

The most common method is to identify a main office, or an automated-attendant phone number, that external users can dial and be transferred to in order to reach users with an internal extension. This type of attendant does not have to exist, but it usually makes sense to leverage this number in the telephone URI. After this number is identified, it should be used as the telephone ...

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