The user data (name/first name) of the users can be changed by users with the “Administrator” role or a separate role with appropriate permissions.
Open the desktop or web client.
Click the small gear icon at the bottom left.
Then select Organization settings.
Click on the [/keys]Users[/keys] tab.
Click on the user you want to edit. You can now edit the user via the Edit user option (The pen as pictogram).
Email addresses of other users cannot be edited.