Olá César,
Por favor, verifique as notas:
1815509 - New enhancement "License Abuse Prevention" in SAP Business One 9.0
1810895 - Your session has been locked because another session was started using the same user ID
776856 - Cannot log on; the user is already connected
https://websmp130.sap-ag.de/sap%28bD1lbiZjPTAwMQ==%29/bc/bsp/spn/smb_searchnotes/smb_index.htm
Abraço,
Marcelo Silva Santos