Open Outlook and go to your Inbox or the folder containing the emails
Hold Ctrl and click each email you want to forward
Right-click the selected emails
Click Forward as Attachment
Enter the recipient’s email address
Add a subject and message if needed
Click Send
If you want to forward the emails separately, open each email and forward them one by one
If you use Outlook on the web, select the emails, then choose Forward from the toolbar if available, or forward them as attachments using the desktop app