Add SCIM custom schema support for user provisioning
The Active Directory schema contains many attributes that aren't from standards such as LDAP, for example division on organizationalPerson. These attributes can map directly to SCIM attributes but have no equivalent in a standard compliant LDAP directory. Because Azure AD SCIM does not allow the use of schemas other than SCIM standard and enterprise extensions it is not possible to extend a third party LDAP directory to match AD's attributes and synchronise them between the two directories.
Mike Fernandes commented
Usage of Azure AD SCIM will always be limited if all it can be used for is the standard and enterprise extensions