While reviewing the public preview feature of One-time passcode authentication for guest users, it was observed that the guest user session expires only after 24 hours. This seems to be a longer window and we will prefer to have the user session time to be something like 8 or 9 hours. The guests will be signing in from their environment and we don't know how secure their environment is and how secure is the email account that they are using. Leaving the user session open for 24 hours seem to be risky and we will prefer to have an option to reduce the session expiry time. Thanks.