This guide goes through how to configure Author IDs which helps users to easily identify who created the dictation.
Please follow the steps to add an Author ID.
Once its configured the next step would be to register the Author IDs to the device if you are using a mobile recorder then please follow the guide Register Author IDs to a DS-9500/DS-9000.
If you are using a fixed microphone then this will be automatically applied to the new recordings. If you have multiple Author ID's then you will need to consider enabling "Prompt for Job Data" found in Direct Recording settings in the Workflow tab.