FSM Business Partner Contact Persons are integrated with SAP customer and vendor objects. The integration works both for XD02 and XK02 or BP transactions and has been available since 2111/2202 Release.
Contact persons can be created, changed and deleted on SAP side and created, changed and deactivated on FSM side.
Deactivation is reflected in SAP only in case when BP transaction is used for customer/vendor handling. Contacts deactivated in FSM are populated in SAP with dummy Vaild From date (31.12.9999) as on the example below:
(S4)PACG 200 SP04