In a entity I have a dropdown on a form, FirstDropdown with values (One,Two,Three)
On Another Entity i have a SecondDropdown, values (1,2,3,4,5)
I need to add 6,7,8 to the second Dropdown . But the requirement is that those newly added values should only be visible if One or Two is selected from the FirstDropdown.
How to achieve this without using JavaScript or dependent option set in CRM online ?