UDF Not Showing up In DFDM

I added an UDF to the CI_Item, I can add it through custom office to the additional tab in item maintenance.  However, I can not see it in DFDM and when I go to check off the check box I get the error message "The column is not in the IOList.".  I've tried removing the UDF and re-adding it, there is a 3rd party solution that is suppose to look at this field and run through some logic to select alternate items depending on available inventory, but they said this error is not on there end, supposedly.