Vpoll is a specification currently in draft form and Bedework has an implementation of the current draft. To enable polls add the feature "VPOLLUI" to the featureFlags element in system.xml. If it's the only feature enable it will look like "-VPOLLUI-".
The implementation uses a CalDAV endpoint configured to use forms login. Wildfly single signon should be enable so that a user authenticated to the calendar client is also configured for interactions with the CalDAV service via that endpoint.