Unable to migrate one user account and not getting any error. Output shows as selected object 1 migrated 0.. Can anyone help on this?

You may have to open a support case for this. Without more information from the logs, it could be that something in the scope you're trying to migrate includes an object that would not, according to whatever you specified, be migrated, so there are no errors. Can you be more specific?

The settings you have listed are related to the Directory Sync and is only visible when the Synchronization Node is selected in the left column of the UI. It does not reflect anything about the migration sessions. 

This is the report from a migration session. As you can see, the Selected Objects is 1 and the Migrated Objects is 1. 

Did you run a migration session and look at the sync statistics?

you are trying to clone an user account. But the user already exists in your destination