For SSO configuration in BOE with SAP you configure a default authentification (SAP) system in Central Management Console.

While in InfoView you are able to edit the SAP System ID and SAP Client Number (see below), the authentification in LiveOffice always runs against the default authentification system.

With the following workaround you are able to use another, than the default authentification system in LiveOffice.

As in LiveOffice Logon Dialog you cannot edit he SAP System ID and SAP Client Number, you can just use the fully qualified SSO-User:

[System-ID]~[Client-No.]/[Username]

For System-ID and Client-No. use the System-ID and Client-No. of the authentification system you would like to use instead of the default authentification system.