RFC Destination Check issue
RFC Destination type 3 was recently deprecated by SAP in SAP-Basis version. Current SAP Plugin RFC Destination check does not work for new RFC Destination types H/G. New update that implements support for type H and type G with no user is coming soon (v1.2). Type G with Basic Authentication support is under development.
RFC Destination types:
Back to the SAP - website
type 3 (old deprecated) - since SAP Plugin 1.0
type H (HTTP to ABAP system) -since SAP Plugin 1.2
type G (HTTP to external system)
with no user - since SAP Plugin 1.2
Basic Authentication - planned for SAP Plugin 1.3
For more information, please check the information from here.