Do you have a student who receives accommodations through DRO (ex. extended time)? Do you need to grant a student an extension (ex. for a date outside of the designated exam window)?
Quiz overrides are used to take priority over the default settings of a quiz to meet particular student needs, such as additional time settings or extended dates.
For more information on how to input a user override for a student receiving extended time or other accommodations, please visit this link.
IMPORTANT: A group override should generally not be used for an ADA accommodation, since these accommodations MUST be kept confidential, and Group names in Moodle are by default visible to other class participants.
Overrides are specific to the quiz, so they must be applied on a quiz-by-quiz basis.