Dynamics Community Forum Thread Details

How to implement email domain validation for Lead emailaddress1 in Dynamics 365 Sales?

Hi everyone,
I am working on a Dynamics 365 Sales model-driven app and want to implement email domain validation for the standard Lead emailaddress1 column.I have enabled all the documented prerequisites for Smart Email Address Validation:

Power Platform Environment → Data Validation: Enabled
Sales App → Enable Smart Email Address Validation Control: Enabled
Sales App → Email Validation for Leads: Enabled
Lead emailaddress1 is the standard Email column
The column is available on the Lead form
The app has been published

The native validation works for some invalid/unknown domains. For example:

rvaldes@example12345678910.com

shows:

"This email address doesn't seem to be valid."

However, I want to implement a specific business rule where only our organization's approved domain is considered valid.

For example, if the domain is

abc@company.com → ❌ Invalid domain
abc@wrongdomain.com → ❌ Invalid domain

Could someone please clarify:

Does the native Smart Email Address Validation feature support organization-specific/allowed-domain validation?
If not, what is the Microsoft-recommended approach to implement domain validation for emailaddress1?
Can this be achieved using a Business Rule, or is JavaScript on the Lead form the recommended approach?
If JavaScript is recommended, is there a Microsoft-supported API or approach for validating the email domain?

I am specifically looking for a solution that can validate the domain, not just the email format.

Thank you.