We've run in to a few situations where recipients of a file share link needed to return to the share some time after the share expired and we had to create a new share in order to get the files to them. It would be great to have the ability to extend the expiration on a share that is nearing its expiration date or reactivate a share that has expired but not yet self-deleted. For additional customization perhaps this ability could be configurable on a per user basis allowing the administrator to decide whether all or some users can extend a share or just the admin himself.
