Documentation
Update the display name of an administrator
inSync On-premise 5.4 Administrator Guide
On-premise Editions: 
Private Cloud Enterprise 
Professional
Private Cloud Enterprise Professional Procedure
To change the display name of an administrator
- On the inSync Master Management Console menu bar, click Manage > Administrators.
- Click the administrator whose name you want to update.
- In the Summary area, click Edit. The Edit Administrator window appears.
- In the Display name box, type the new name for this administrator.
- Click Save.