Blog Post: How to add custom validation logic to validate a phone field in SharePoint

How to add custom validation logic to validate a phone field (UI) 1. On the UI, go to List Settings 2. Click on Column that stores the phone (code below assumes the field is called Business Phone. Note that Business Phone is a built-in field in SharePoint) 3. Expand the Validation section 4. In the formula [...]
Blog Post by: kadasani