Overview
Microsoft Dynamics® AX 2009 Service Pack 1 (SP1) contains the complete set of updates that Microsoft has issued since the June 2008 RTM release of Microsoft Dynamics® AX 2009, as well as a number of enhancements and new features to improve the product’s functionality and user experience.

NOTE: The majority of these fixes are specific to individual modules or workflows, and as such should not require a full re-evaluation cycle of Dynamics® AX 2009 SP1 at sites where the RTM version of the product is already under evaluation. Only incremental testing in the relevant areas may be required.

Other key highlights in this service pack release include:

SP1 includes enhancements to support future GLS releases and targeted releases, such as the Environmental Sustainability module, which will require an SP1 environment for installation.
Beginning with SP1, Microsoft Dynamics® AX 2009 also provides support for Microsoft SQL Server® 2008.

The SP1 installer updates both the SYS and GLS layers of the product. This means, for example, that if you already have GLS-TR installed on your system, SP1 will update this layer during the installation process.