Can we add new domain id in Dynamics 365 to send emails

Hi All,

I am having dynamics 365 trial version and able to send emails from the actual user id. instead of that I want to send emails to my customers using another Id, which does not belongs to the same domain.

Actual Email id: User1@org1.onmicrsoft.com

Desired to send email from: User2@org2.com

I did try to do it by changing Primary email of the user, however no luck. kindly let me know the way to achieve it, if possible.

Thanks,

Venkat.