You can upgrade to Microsoft Dynamics AX 2009 directly from Microsoft Dynamics AX 4.0 or from Microsoft Dynamics AX 3.0 (formerly Axapta) with a supported service pack. Dynamics AX provides the tools to successfully plan and complete your upgrade with minimal downtime. To upgrade, use the information in the following topics:

Introduction to upgrade

Before you upgrade

Upgrading to Microsoft Dynamics AX 2009

Application upgrade notes

Walkthrough: upgrading date and time table field pairs into UtcDateTime

AIF upgrade process

Code upgrade: Examples

Additional code upgrade information

Additional data upgrade information