Check List

Consider the below as the possible items to check before completing the user access
to backend SAP System.

End user access consideration:

Check if the user ID is the same in the backend ECC and Portal.
If the user ID is different perform User mapping.
Check the backend ECC role and access the transaction in ECC.
If it fails check for authorization Issues in SU53.
Check the right role in the portal that has been assigned to the end user.
Check if the user is assigned to a user group which has the right Portal Role
that the user is accessing.
Check for permissions in the system object that is connecting the ECC system.
Check if everyone user group has end user permissions for the system object.
Check if the user group has the end user access assigned in the system object permissions.
Check for the language in the user ID in identity management of the user administration in Portal.
Check for the iView properties to determine the right client name and the system number of ECC.
Check for browser issues such as popup blocker.
For iViews broadcasted from WAD determine the type of alias to be mentioned in the system object properties of the iView.
Try SAP_LocalSystem or delete it completely (Depends on the SP)