No, but you can easily extend the onboarding period, and since the onboarding period can be extended, there is not limitation in fixing the end date on a task.
!! Onboardees will not get email notifications if tasks are assigned outside of their onboarding period!!
In order to change the Onboardee period, contact your CSM or Support.
If you still have questions after reading this article, don't hesitate to contact us by submitting a ticket.
We're always happy to help ! :)