There are several third party applications that make it possible to create PDF documents from within Microsoft Office. Most of these add a virtual printer that converts the Microsoft Office document to PDF. There is however an official way to add PDF - and XPS - support to Microsoft Office 2007 and its various programs like Microsoft Office Word 2007, Microsoft Office Excel 2007 and Microsoft Office PowerPoint 2007.
Microsoft is offering a plugin on their homepage that adds pdf support to Office 2007 adding PDF as one of the options in the Save As dialog. That's probably the most effective way to add support for PDF documents to Microsoft Office 2007.
This download allows you to export and save to the PDF and XPS formats in eight 2007 Microsoft Office programs. It also allows you to send as e-mail attachment in the PDF and XPS formats in a subset of these programs.
The plugin can only be downloaded if you have a genuine Microsoft Office 2007. The check will be made before the download link for the plugin becomes available.
Update: Microsoft has integrated native pdf exporting options into its Office 2010 suite, making the plugin redundant for this version, and likely all future versions of Office. If you are new to Office 2010, or never used the pdf export feature before, you'd probably like to know how you can make use of the feature. It works similar in all Office programs.
If you want additional information about the process, you find detailed information on Microsoft's Office website. There you find detailed instructions for all Office 2010 applications.
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