I have my users use other zoho products like books, support etc.,

I want to have a different password for their zoho vault user account and a different password for the other apps say zoho books. 

Currently since its the single password for all zoho accounts, if we give the user zoho vault password it can be used for other apps, while we like to restrict them to click-auto-logon on other apps. With this we How can this be achieved.

If we provide a different email id for the vault, once they login to vault its not allowing them to login to other shared apps

Thanks,