You can customize the local help content in several versions of Word, but the online content, which 'grows' to include even links to
discussions such as this one is part of the Microsoft website family and isn't accessible to users to customize.
What version of Office are you using and what type of customizations were you thinking of wanting to the
http://office.microsoft.com/help content?
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Is it possible to customize the on-line help within Office?<<
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Bob Buckland ?

MS Office System Products MVP
*Courtesy is not expensive and can pay big dividends*