Uploading ABAP roles in Portal

Hi All,

I hv some fundamental questions regarding uploading of roles in Portal:

What is the need to upload ABAP roles in Portal? Through user mapping we already establish connectivity of portal userIDs with userIds in R/3 or ECC (wherein most cases these IDs are the same). Hence, shouldnt the portal userId inherit these r/3 roles by the virtue of user-mapping? If so, then why do we need to hv these roles in Portal? Thanks in advance!

cheers

Prachi

PS - Pls dont point me to docs providing steps on how to upload roles in Portal, i'm familiar with these:)