The expiration time of the invitation link is based on the the day on which the link was sent.
Default value is 7 days validity after the link was sent. However, if you would like to have it changed, don't hesitate to contact your Customer Success Manager informing what timing you would like to have.
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 ! :)