Microsoft Office is one of the most widely using office processing applications but it not contains option like save as PDF. PDF format is also safer for us; we can avoid people changing the contents of the files. It is recognized as a standard document format. By using Microsoft Office Add-in, you can save all the Microsoft Office file extensions in PDF or XPS format. No need to install any software printers with this software’s. Refer this article for creating pdf using Open office
Microsoft is offering this plug-in on their homepage that adds pdf support to Office 2007 adding PDF as one of the options in the Save As dialog box. It is the most effective way to add support for PDF documents to Microsoft Office 2007.
Download and Install the 2007 Microsoft Office Add-in