Have you seen this error?
Error has occurred making remote call to method DISPLAY in system CRM
Message no. B1777
You receive this when trying to view a CRM related document (e.g. Billing doc) from ECC (Say via doc flow).
The solution is....
In ECC the table CRMPAROLTP has an entry for:
CRM_DEFAULT_DESTINATION_DIALOG
(Param2) CRM_BILLING_DOCUMENT
(Param3) Space
User CRM
Paramval CRM_Dialog
The RFC destination CRM_Dialog would use the current user.
