Exchange Online how to setup forward e-mail to outbound recipients without e-mail account

1. Login https://portal.office.com with admin right account

2. Application Menu > Admin Icon > Admin Centers > Exchange > Recipients

3. On Contacts, create outbound contacts
 - create outbound contact first so we can configure the forward later

PS. This is outbound contact

4. On Groups, create a distribution groups and assign member for forward

 - create distribution group

- in Members, you can add the contacts on members list, previous we already create a contacts, so we can add here

5. after create a distribution group you should edit and make it work from inside and outside sender.

- in "delivery management", should click "Senders inside and outside of my organization"

 - on "email options" you can add/remove forward account.

For Example :
current is support@davidfongco.com.hk forward to support@my-system.com.hk
here you can add more address such as it@davidfongco.com.hk, so support & it @davidfong incoming mail will forward to support@my-system.com.hk.

If you want forward to outbound more recipients, you should create more outbound contacts and edit from membership page.