Update UDF User Defined Field linked to system object
I have several User defined Fields attached to the Item Master data.
I have several users which have read only access to the Item master Data but I would like them to be able to update my User defined Fields.
When I try and update through DI API I get the error:
"The Loged On user does not have permission to use this object"
How can I give users access to the User Defined Fields but not the rest of the Item Master data?