By default, your MSL System setup does not allow a user to change their vote once it has been cast.
Votes can only be changed up until the end of the polling period.
If Election Vote Changes is enabled on your MSL website, on the Voting Completion page, a Change Vote linkfield is displayed alongside the posts the user has voted for. If you would like us to enable this feature, please ask your Contractual System Admin to get in touch to request we enable Allow Election Vote Changes.