Solution : https://service.sap.com/sap/support/notes/571350 (SAP Service marketplace login required)
Key words :
terms user id, user id generally, treats user ids, user ids stored, user id <userid>, string canonicaluserid=umfactory, case-sensitive userid, case case-sensitive, case-sensitive form, case-sensitive
Related Notes :
448828 | EP 5.0: Central Note for EP-PIN-USM (User Management) |