The reason that the new OneRoster integration between Canvas and PowerSchool doesn't always include missing and late labels is largely because of the structure of the OneRoster API that is used.
The way the integration passes a student's grade or submission status for an assignment is in a Result object. In order for the missing or excluded to be sent to PS, the One Roster API requires a Score be included with the Result. Because of this if there is no grade, in the case of Missing a 0 is provided as the Score. In the case of excused/exempt/Excluded which may or may not have had a prior grade entered in Canvas before being excused, if there is no prior grade a 0 will be sent instead. Without a Score PowerSchool’s One Roster API, will reject the grade entirely.
The Latetag, is one that is not currently supported by the PowerSchool’s One Roster API, this has also already been mentioned to the PowerSchool management team, so those handling the One Roster API are aware of this limitation, meaning there’s nothing Canvas or PowerSchool can do to make Late work. If an assignment in Canvas is marked as Late and the late policy has deducted points from their Score then the intended reduced Score will be posted to PowerSchool.
