Office 365 user send email forward

[jabbarsh]

Being admin I set user email forward for incoming email, but I want to set forward rule send mail also. How can I make this ?.

Any help really appreciated.

[#2]

Configure a Mail flow rule that automatically adds recipients (either via to/cc/bcc fields) for any messages sent from the mailbox in question.

[#3]

Hi, Can you please tell me. how to create the flow. I haven't used this before. If there is any reference link will also work for me.

[#4]

You need to have admin permissions to create mail flow rules. If you already have such, go to the Exchange admin center and follow the steps here: https://docs.microsoft.com/en-us/exchange/security-and-compliance/mail-flow-rules/mail-flow-rules
For your scenario, configure the "recipient is" condition and the "add recipients" action. Add other conditions/exceptions/actions as needed.