Authenticator start and expiration time

The authenticator start time defines a particular date and time when an activated (software) authenticator can effectively be used for authentication. The authenticator expiration time defines a particular date and time when an authenticator expires and can no longer be used for authentication.

Both, the authenticator start time and the authenticator expiration time can be defined when an authenticator is assigned to a user.

If the current date and time is not within the start and expiration time of an authenticator, that authenticator cannot be used for authentication.