To Create, reply to, or forward email messages in Outlook, please follow the provided guideline and screenshot below:
1 — Select an email message in the inbox, and choose Reply, Reply All, Forward
2 — To respond to the message you have received, Edit subject if you as your wish and then Send button
Please note below:
Reply: to send email back to the only person who sent email to you.
Reply All: to send email back to the sender and all recipients in the message.
Forward: to send email to someone else to take action or for their information.