When a staff member goes off on Maternity leave, you should not delete or end their contract or business roles in Arbor (unless they are permanently leaving your school). Instead, you can add a record of their absence.
You can also temporarily suspend their account if you don't want them having access to Arbor at this time. We have guidance on this here: Suspending a staff account.
To add a staff absence, the Staff Profile: All Staff: Basic HR Administration and Finance: Administer permission. If you don't have the permission, you'll need to ask your admin team to give you permission using these instructions.
Go to School > Staff > Absences. Click Record New Absence and Input the correct details, selecting Maternity Leave in the Absence Category. You can see more about logging absences here: How do I add a staff absence?