How to send mail using shared account

[premkumarrtech]

How to send mail using shared account configured for an account without using onbehalfof ?

Below is the scenario:

One user [email protected] is added in outlook application files tab
User have access for an shared mailbox [email protected] . So, user can see two from account ['[email protected]' , '[email protected]'] when composing new mail
User can change from as [email protected] when composing mail manually

need help to automate same using VBA
We succeeded for changing from account when two accounts are added via files tab
we can't change\set the from account as shared mailbox account

we welcome your team to help us on this