We are trying to implement one custom functionality to restrict the user for selection of date within 6months only in Manage your Substitute(Choose Substitution Period) in My Inbox Fiori application (S/4 HANA onpremise). We have gone through the documentation provided by SAP there are no extension points or UI Controller hooks available to restrict the date selection.
Could you please guide us to achieve the above custom functionality ?
Application Name : My Inbox
Application ID :F0862