If I move to the cloud version , does that affects to the process of on my on-prem orchestrator ? If I want to update password for my service user account on orchestrator , Do I need to update on App pool services after moving to cloud? fYI- Currently need to upgrade password on AD and app pool also.
After migration, you will use the Cloud Orchestrator. So they are independent.
For post migration, check Automation Cloud - Using the Migration Tool