Solution : https://service.sap.com/sap/support/notes/318515 (SAP Service marketplace login required)
Key words : 
post-configuration checks provided, snc-related 307356 snc install, multiple logon popup appearscorrection, 325222 incorrect error message texts, workplace single sign-onadditional documentation, logon error codesadditional documentation, sap logon ticket 366805 wp 2, sap service marketplace, sap logon ticketcorrection, general 138498 single sign-
Related Notes : 
       
| 509237 | LDAP authentification via PAS for ITS | 
| 493107 | SSO integration via ITS using PAS | 
| 486032 | Login templates for ITS in PAS | 
| 402639 | |
| 402076 | |
| 379081 | |
| 374959 | |
| 372043 | WP 2.11: "Cannot get Dynpro information" | 
| 368159 | WP 2.11: login problems for some domains | 
| 366805 | |
| 365336 | |
| 363068 | |
| 360496 | Workplace 2.10/2.11/Support Packages/ITS-Version/Workplace P | 
| 358296 | |
| 356691 | |
| 354646 | |
| 354466 | Nvgtng out of Workplace does not delete SSO Cookies | 
| 350776 | Workplace: Logon ticket for X.509 logon | 
| 337794 | |
| 326604 | Workplace: Multiple logon popup appears | 
| 325222 | Incorrect error message texts in ticket logon | 
| 324758 | Password change during Workplace logon impossible | 
| 307474 | Workplace 2.10/2.11: Known Bugs and solutions | 
| 307356 | |
| 304485 | Sending cookies only to a web server | 
| 177895 | Refitting the mySAP.com Single Sign-On capability |