In service notification, when we use a one-time customer as sold-to-party a pop-up screen ' Address Maintenance' appears. In the address maintenance screen we want to make the field 'Mobile Phone' as mandatory. Please suggest how this validation can be built via configuration or abap development.
We are in version 4.7 c.
The field name is : MOB_NUMBER
Data element: AD_MBNMBR1
Screen field: SZA1_D0100-MOB_NUMBER
Actually this is passed via structure: SZA1_D0100
Before the value is stored in any table we need to check if the field is blank during creation mode and build a validation such that it is a mandatory field