Now contains many customer-driven fixes Outlook SP2 performance General responsiveness The overall responsiveness for Outlook SP2 is significantly improved over the responsiveness of Service Pack 1. Responsiveness can be loosely defined as the application's reaction time when you use the user interface UI. A perfectly responsive application immediately begins performing the task that is requested even if that task takes a long time. Making Outlook noticeably more responsive was a big priority for this release. Storage engine The most important changes come from underlying optimizations in the local storage engine.
Main article: Such files are saved using an extra X letter in their extension. However, it can still save documents in the old format, which is compatible with previous versions. Alternatively, Microsoft has made available a free add-on known as the Microsoft Office Compatibility Pack that lets Office , XP, and open, edit, and save documents created under the newer format. However, due to legal objections from Adobe Systems , Office originally did not offer PDF support out of the box, but rather as a separate free download. This is part of Service Pack 2 and prior to that, was available as a free plug-in in a separate download. OpenDocument software Microsoft backs an open-source effort to support OpenDocument in Office , as well as earlier versions up to Office , through a converter add-in for Word, Excel and PowerPoint, and also a command-line utility.