Dear Plaban,
with SU24 I've check all the auth check assigned to XD03 verifying that within F_KNA1_GRP the linjked specific account group.
With PFCG I've checked role A_FBD(CLI) in particular authorization data to see if it's linked to Customer: Account Group Authorization.It seems all correct but when I call XD03 transaction the system seems not pass through F_KNA1_GRP.
Many thanks
Angelo