One of the more eagerly awaited features of Office 2007, the ability to save files in PDF, will now have to be downloaded separately.
The exact reasons for this are unclear but it seems that Microsoft and Adobe were unable to agree on how it should be included. Microsoft will make this feature available as a separate download.
The PDF format has become very popular as it guarantees that a document will look as it is intended, regardless of missing fonts or images on another computer. It has been included on competing products such as OpenOffice and WordPerfect Office for many years.
News source: Computeract!ve