Add user

Select department for the new user (here: Department B) - will be marked in bold text
Create new user by selecting "+"

Add user by registrating:
- First name
- Last name
- Email adress
- Username

You can change the selected department by clicking on the department

or add permission groups and roles right away

Select permission groups for the user: click on "Permission groups" or "NEXT"

Add roles for the user: click on "Roles" or "NEXT"

Edit user

Do your changes and UPDATE

Change Department by click on the user in the folder structure and drag to the wanted department.