Share outgoing transmittal with passcode

How does this affect me?

User create a new Transmittal directly from a modern document library. It is not longer needed to select a send method, while all transmittals will be shared with a link with a passcode. Which allows receivers of the email to login with a one-time passcode which the receivers will receive in a separate email.

What do I need to do to prepare for this change?

When will this be released?