You can re-open a closed vote within seven days, which allows your voters to continue voting until the new end date without requiring new access keys.
To re-open your vote:
go to the Results page
select Reopen Vote from the Actions dropdown menu:
the Edit window will open; edit the end time to meet your needs
select Confirm to re-open your vote
Notices are not resent when re-opening a vote. Please contact your voters to inform them of the re-opened vote or send a reminder through ElectionBuddy.