Is your Dynamics AX tab missing from the Excel menu, even though the Dynamics AX Office add-ins has been installed? If your Microsoft Dynamics AX 2012 Client and Microsoft Office Add-ins is installed on the machine (you can see this in Programs and Features> Installed Updates), you’ll find the solution below.
Solution for missing Excel tab missing in Dynamics AX:
Make sure the COM Add-in is active in Excel. Do this by opening Excel, then go to File> Options> Add-Ins. In this window, under Active Application Add-ins, you should see Microsoft Dynamics AX-Add-in for Microsoft Excel listed like below.
If it is not, then click on the drop down by Manage: and select COM-Add-in and click on Go.
Check the box by Microsoft Dynamics AX Add-in for Microsoft Excel and click Ok.
Close out of Excel, and re-open it. If Dynamics AX is missing again, then change the LoadBehaviour to a 3 in the following registry key: