Storage migration service operational log is empty

Hi I can not find logs for operational but only for debug and admin for Storagemigrationservice and storagemigrationservice-proxy.

I justy disable and re-enable operational log from the gui and also from powershell but nothing change.

There is some trick in the registry? I find the registration in 

C:\ProgramData\Microsoft\StorageMigrationService but there is a edb and their relative logs that are not txt format.

I need to trace the duration of the past process because I need to sync the migration in scheduled manner