Dear,
Are you using own calendar or Employee calendar ?Are you integrating with OUTLOOK ? If you want to integrate with out look, here you need to have an interface.Outlook calendar integration allows enterprises to plan their appointments in the SAP system, regardless of whether users maintain their appointments in the SAP calendar or the Microsoft Outlook calendar.
could you kindly brief your concern little bit more pls? In this regard you can approach your BASIS consultant to have more data on this.
Try with FMs: these FMs are based on your system release and version level.Kindly check.
APPOINTMENT_GET : APPOINTMENT GET &
APPOINTMENT_RULE_GET : APPOINTMENT RULE GET
Regards,
Pardhu