Suggestion:
User can follow the below steps to define IBCA RCP (Inter Branch Conntrol Account).
1) Change the login site to A
2) Open the IBCA RCP form, Site code from will be set as the login site ‘A’.
3) select the the site to ‘C’
4) Select the Account code and CCTR for Issues and Receipt
5) Select the link type and save.
For IBCA RCP form goto Finance-> Finance settings->Master_> IBCA RCP