To set Smart-ID and mobile-ID required RPUUID service access:
1. Launch the DigiDoc4 Client application.
2. Open at the top right "Settings".
3. Under "Settings", select "SIGNING SERVICES".
4. Set the RPUUID in the "Access to mobile-ID and Smart-ID service" box.
Authorities can also set the RPUUID value via registry. More information about registry parameters can be found here.