Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Hello Sandra Grafe,Good morning!Thank you for publishing in Microsoft Community. We are happy to help you.Based on the description you have shared; we understand that you have already sent email poll and you want to edit and end itAfter thorough research, testing from my end and consulting, it’s been concluded that you can edit the poll after creating the poll in outlook click next and outlook give option to edit after sending it you can't edit. After you send you can only delete the forms from on forms.office.com. if you don't need anymore. So as workaround, you can download the response in excel and delete the form to end it. the end recipients can access the link but can't vote.
We apologize if the step above did not meet your requirement.
however, thank you for bringing this to our attention, we will surely raise you concerns to our Product Team and hopefully this can be included in the future updates.
In the meantime, please feel free to post this in our Feedback community by visiting Microsoft Forms · Community as it is a community monitored by our Product team to help improve user experience with Outlook, via feedback given by our valuable customers. (add your emails address)
For other concerns, please do not hesitate to add you post in the Microsoft Community Team. Thank you for choosing Microsoft as your partner in business.
SincerelyEben Ezer Tres | Microsoft Community Moderator