Hi Alexander.
Yes, I meant the RFC to the CRM system. Do you have the RFC assigned to the data objects?
Can you do remote logon?
ESMBO_ID is the ID of a mobile data object like for example MAS_PARTNER. You should be able to see all the data objects & status in TCode SDOE_WB. The Backend Adapter MAS_PARTNER has some functions defined to use by default, RFC assigned to that data object defines where is the function defined. Try to navigate to any functions of the MOBS ID that is not working.
To know the description of one ID I think you can enter table SMMW_HDR.
Regards