Hi @Daly, Kelly ,
I have done a test that create a poll on my Outlook365, and I found the same result as yours. I can only see the poll results but not voters, and in https://forms.office.com/ , only the results can be found. According to my research, this may be by design.
If you indeed need to see who responded to your vote, it is suggested that you could sign in to Microsoft Forms and create a new Form, choose which kind question you want to add. After creating, you could add the link of the Form to the new email in your outlook. After filling in the form, you can select "Responses" tab on the form and click results or more detail to view the results and voters.
For more information, please refer to:
Create a form with Microsoft Forms
Check and share your form results
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