Meanwhile Enterprise Support could clarify.
The parameters ROAMIDENTITY and ROAMLICENSING are not supported by the MSI (base) installer.
If the Setup.exe is used, the patched installer is used and will proceed correctly.
I'm using now this command:
Setup.exe /sALL /msi IGNOREVCRT64=1 TRANSFORMS=AcroPro.mst ROAMIDENTITY=1 ROAMLICENSING=1 /L*v C:\Temp\AcroDC.log