How to read SO_FOLDER_READ_API1 by other user?

Hi all,

I need to get the Inbox details for a specific user, so as to change  the  status of unread document as read if the processing for it is successful in my logic.

Now while trying to get the folder details for this specific user, the system raises an exception that OPERATION_NOT_AUTHORIZATION

I tried giving SAP_ALL and same authorizations as that particular user, but it didnt work.

Is it possible to read the folder details by some other user ? ex : reading the folder of user1 by user2 after logging in using user2.

Regards.

Devashish