No possibility to set their password to an expire after certain number of days.
You can share the encrypted files with other users using AxCrypt key sharing Feature.
There is no need to share passwords in order to send or share files securely with others.
AxCrypt has a key sharing feature letting you add recipients by email address, who when they receive the file can open it with their own AxCrypt password.
For more information about Key sharing here: https://www.youtube.com/watch?v=9z3KOZD-Yks
If your are asking any other quires, you can feel free to contact our support via firstname.lastname@example.org .