Conditional Required Field Validator
With this workflow validator, you can ensure that field is required only if another given field has data
To add 'Conditional Required Field Validator' to a transition:
Click Edit for the workflow that has the transition you wish to add the validator on.
In the Workflow Designer, select the transition.
Click on Validator in the properties panel.
Click on
Add
validator
.Select
Conditional Required Field Validator
from the list of validators.Click on
Add
to add the validator on the transition.Fill the form shown below and press 'Add' button.
Fields
Error Message – Set here the message you want to display o users when this validation fails