What does encrypted email mean?

Hi @Cranbin

For introduction about Encryption in Outlook please refer to this link:

Encrypt email messages

Encrypting an email message in Outlook means it's converted from readable plain text into scrambled cipher text. Only the recipient who has the private key that matches the public key used to encrypt the message can decipher the message for reading. Any recipient without the corresponding private key, however, sees indecipherable text.

Can you set a corresponding one-time code to encrypt the email?

To my knowledge it may not be possible for the sender to set a one-time code.

While if the recipient is using other email service than Outlook, they can use one-time password to sign in to read the email.

For more details please refer to this link: Manage the use of one-time pass codes for the encrypted message portal

Example (send an encrypted message to a recipient using Gmail):

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Email encryption refers to protecting emails by disguising their contents so that only the intended recipients can access and read them. Email can be an vulnerable medium, especially when it is sent over an insecure network or a public network, because other users can intercept and read the message. Encryption protects emails by making their contents unreadable on the way from source to destination, so that even if someone intercepts your mail, they can't read it.hinja.store