In Arbor, we have a feature that allows you to edit attendance marks that were taken in your previous system then migrated over to Arbor. Please note, this will not change the attendance mark in your previous system, it will only update the marks in Arbor.
As these attendance marks were not taken in Arbor, you cannot amend them using Arbor's standard attendance pages. Instead, go to Students > Attendance > Admin > Edit Imported Marks.
For a single student
Click on the filters at the top of the page to select the date you require and a group of students that the student you want to change marks for is a member of.
Find the student in the list, and locate the mark you want to change. Click this mark.
Select the mark you would like to change it to from the drop-down list.
For multiple students
Click on the filters at the top of the page to select the date you require and the group of students.
Find the students in the list, and locate the marks you want to change.
Turn the bulk mode on to select multiple marks, then tick the boxes next to the marks you need to change. Select the mark from the Mark drop-down menu.