SharePoint Customization White Paper

For those doing customization, you might want to check out this white paper:

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This policy document outlines the items and processes for managing customization within an enterprise Microsoft® SharePoint® Products and Technologies hosting environment. This document begins by describing the service management concepts relating to the hosted services. It then presents information on commonly requested customizations and a few customizations that are not commonly requested, but which present significant risk to the hosted environment. Lastly it details some service policies that might affect customization planning or implementation.

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