Microsoft Dynamics AX 2009 Upgrade Path

Microsoft Dynamics AX 2009 is the most advanced version of the Microsoft Dynamics ERP platform and represents over 200 feature enhancements including role based dashboards, home. The upgrade path for Microsoft Dynamics AX 2009 is laid out below

You can upgrade from Dynamics AX 4.0, Dynamics AX 4.0 SP1 or Dynamics AX 4.0 SP2. The most painless naturally is the Dynamics AX 4.0 SP2 to Dynamics AX 2009 however in general the upgrade from version 4.0 to 2009 can be relatively painless if done right

You can upgrade from Axapta version 3.0 directly to Dynamics AX 2009 or by upgrading first to version 4.0 and then to Dynamics AX 2009. The two-step upgrade can actually make things simpler in terms of resolving code conflicts and is probably ideal for a complex/ heavily customized environment. The single step upgrade works well for less complex environments.  Even when following a two-step upgrade, users will see it as a single step as they would be upgraded from version 3.0 to Dynamics AX 2009. The two-step reflects the technical details of how it would get done. It doesn’t mean that your user community will need to work on version 4.0.