The same edits need to be carried out on the share-config-custom.xml however the <realm> will be the Active Directory domain name and the <endpoint-spn> will use the load balancer address and Active Directory domain.
For example:
<realm>AD-SSO.EXAMPLE.COM</realm> <endpoint-spn>HTTP/alfresco.example.com@AD-SSO.EXAMPLE.COM</endpoint-spn>