Vital KM
Can I set the availability when I create a document?
When creating a new document, there is a tab labeled "Availability," which you can set the date of expiry. When the date arrives, all the other members cannot view the document, except for the owner and system admin. Once expired, any authorized member can choose to renew the availability or delete the document.

https://faq.vitalyun.com/EN/Knowledge#2713