Description: This solution discusses acceptable values within LO from RE
Checkbox fields in Luminate Online accept values of "True" and "False". "Yes" and "No" are not acceptable values.
Please ensure the 0 and -1 corresponded to true and false going into LO.
In RE, you can click on Help > Raiser's Edge Help Topics > search the index tab for "Import Layout Tables." This will list what values are acceptable for each RE field. In this case, Requests No Email is blank... we can assume it behaves the same way as other check boxes in the list
In Example: Legend: 0 is no checkbox -1 is checked