From mid-August, Microsoft have announced that you will be able to create a poll in an email, without having to manually install the poll add-in option.

For Windows there are 2 ways you can do this:

Image is not our own. Image courtesy of Microsoft, taken from Message Center email: Major Change Update Notification

or

Image is not our own. Image courtesy of Microsoft, taken from Message Center email: Major Change Update Notification

For Mac:

Image is not our own. Image courtesy of Microsoft, taken from Message Center email: Major Change Update Notification

For Outlook on the web:

Image is not our own. Image courtesy of Microsoft, taken from Message Center email: Major Change Update Notification

What if I already have the poll add-in installed?
If you use Mac or Outlook for the web and have downloaded the Quick Poll add-in, you will need to uninstall it at https://outlook.office365.com/ecp/ in order to use the pre-installed Poll add-in.

When you preemptively uninstalls the old add-in, the new Poll add-in will be automatically installed.