Kami,
Per the JMP System Requirements, JMP 14's Excel Add-In, will work with Office 2010, 2013 and 2016. We have done some testing with the newer version of Excel and it appears to work correctly with it as well.
That said, there are two possible reasons the Excel Add-In for JMP is missing. First, the add-in registry enteries are corrupt and need to be repaired, or a recent Office update corrupted the registry enteries.
With JMP closed, navigate to Control Panel > Programs & Features.
Find JMP 14 in the installed programs list. Right-click it and select Modify/Change.
This will open the installation options box. Find the Excel Add-In, if it is checked, you will need to uncheck it, click OK and follow the process. Reboot and do the above again, checking it this time.
If it is unchecked, check it and follow the process laid out above.
If this does not fix it, this means something is not working correctly with Excel. Since this is an Excel Add-In and not a JMP Add-In, we rely on Excel to function properly.
In this case, in the Programs & Features, find Office. Right-click and select Modify/Change. When prompted, select the option to do a Repair.
This process has resolved nearly every JMP Excel Add-In issue I have encountered.
If this process does not fix your issue, please put a track in to JMP Technical Support and we will help you resolve the issue. You can do that HERE.