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Microsoft Exchange Server 2013: Mailbox and High Availability by Tony Redmond

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Address book policies

Many Exchange deployments will be quite happy with the default GAL, by which every mail-enabled object in the organization is visible to every user. However, situations do arise when companies want to compartmentalize the GAL so that different users see different sets of objects, even though everyone is part of a single organization. In effect, each set of objects represents a virtual organization.

Classically, the reason such segmentation arises is to allow a single Exchange organization to support multiple businesses or even complete companies, possibly managed by a hosting company that wanted to extract maximum advantage from a single infrastructure. Office 365 is an example of a massive shared infrastructure in which all ...

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