Solution : https://service.sap.com/sap/support/notes/831908 (SAP Service marketplace login required)
Key words :
terms ccm authoring search logon login authentication sso srm ebp shop reason, /saphelp_nw04/helpdata/de/0d/a22640632cec01e10000000a155106/frameset, /saphelp_nw04/helpdata/en/0d/a22640632cec01e10000000a155106/frameset, /saphelp_nw04/helpdata/en/e9/bb153aab4a0c0ee10000000a114084/frameset, business server pages / user concept / logon, /saphelp_nw04/helpdata/de/99/15ee3adcf1913fe10000000a11405a/frameset, /saphelp_nw04/helpdata/en/99/15ee3adcf1913fe10000000a11405a/frameset, /saphelp_nw04/helpdata/en/36/020d3a0154b909e10000000a114084/frameset, /sap/bc/bsp/ccm/srm_cse, /sap/bc/bsp/ccm/