I googled Dynamics AX 2009 system requirements and found the official system requirements document.
There it says that supported Operating systems are:
Windows Server 2012 R2, Standard Edition or Datacenter Edition is supported with Microsoft Dynamics AX 2009 Service Pack 1 with Rollup 8 and the hotfix from Knowledge Base article 3209897. –or– Windows Server 2008 R2 Standard Edition, Enterprise Edition, Web Edition, or Datacenter Edition. Service Pack 1 for Windows Server 2008 R2 is supported, but not required. –or– Windows Server 2008 Standard Edition, Enterprise Edition, Web Edition, or Datacenter Edition. Service Pack 2 for Windows Server 2008 is supported but not required. –or– Windows Server 2003 with Service Pack 2, Standard Edition, Web Edition, Enterprise Edition, or Datacenter Edition