This method will guide you to find out all emails in a conversation, and then forward them in bulk as attachments in a new email. Please follow as below steps:

1. In the Mail view, select one of emails in the conversation, right click and select Find Related > Messages in this Conversation from the right-clicking menu. See screenshot:

2. Now all emails in the conversation are found out and listed in the mail list. Please press Ctrl + A keys together to select all of them, and then click Home > Forward.

3. Now all emails in the conversation are added as attachments in a new email. Please add recipients and subject in the email, compose, and then send it.

So far, all emails in the specified conversation have been forwarded as attachments in bulk.

This method will guide you to find out all emails in a conversation, and then forward all emails in the conversation separately in bulk by Forward (Multiple Mails) feature of Kutools for Outlook.

1. In the Mail view, select one of emails in the conversation, right click and select Find Related > Messages in this Conversation from the right-clicking menu. See screenshot:

2. Now all emails in the conversation are found out and listed in the mail list. Press Ctrl + A keys together to select all of them, and then click Kutools > Bulk Forward (in the Multiple Mails group). See screenshot:

3. In the popping out Select Names: Contacts dialog box, please specify the recipients into the To/Cc/Bcc fields as you need, and then click the OK button.

And now all emails in the conversation are forwarded separated one by one quickly.

Count the total number of conversations in a folder in Outlook

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Forward multiple emails individually at once in Outlook