Solution : https://service.sap.com/sap/support/notes/591347 (SAP Service marketplace login required)
Key words :
START_EXIT, user session, html control
Related Notes :
| 663615 | Web requests: Logon and logoff, Single Sign-On |
| 600094 | BSP fragment not current after transport |
| 566092 | Web request: start_exit function CRM 3.1 |