To set the Mandatory fields within the Recruitment Stages please follow the below steps. 

1. Select Masters > Member Masters > Customise Recruitment Stages

Image Placeholder

Image Placeholder

2. Select the Edit Pencil Icon for the Stage you wish to adjust

Image Placeholder

3. Update the drop-down box next to mandatory

Yes = the stage will flag as mandatory during the recruitment process
No = the stage will not flag as mandatory during the recruitment process

Image Placeholder

Select the Green  to Save or Red  to cancel