2092849 - How to create a Business Rule to validate data on change/save, and provide a Warning or Error message

• We need to create a message that pops up when a certain field is not filled in, or to validate certain field criteria either on change or on save. 
• We would like to validate whether a certain field is set correctly, or just prompt the end user to check to ensure certain data is filled out correctly in the EC portlet.

Image/data in this KBA is from SAP internal systems, sample data, or demo systems. Any resemblance to real data is purely coincidental

SAP SuccessFactors Employee Central

EC , Success Factors , Raise Message , Error Message , Warning Message , Business Rule, import, MDF, GO, Generic Object , KBA , sf employee , sf employee_central , raise message , LOD-SF-EC-BCI , Manage Business Configuration (BCUI) & Data Models (XML) , LOD-SF-EC-FOO , Foundation Objects (Organisation, Pay and Job Structures) , How To