Assuming the document is being sent as an attachment, unless you chose the 'Insert as Link' option when inserting, the recipients should be able to open the files via the icons. If they can't, that suggests a problem with their system (perhaps a security setting). If so, you can't control that and your only other option would be to send the documents as separate attachments in their own right.

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Cheers,
Paul Edstein
[Fmr MS MVP - Word]