1. Click the gear-shaped menu button in the header.

2. Click Users & System Administration.

3. Click Departments & users.
   

4. In the search box, enter the display name or login name of the user to find the target user.
   You can also expand the department tree and select the target user.

5. Click the Change button.
   

6. To remove the user from a department:
   In the "Department(s)" section, click "x" to right of the department you want to remove.
   

7. To add the user to a department:
   In the "Departments" section, click the tree icon to select the desired department.

8. Click Save.

If a user belongs to multiple departments, you can set "Primary department" for them.
The primary department is displayed in the Profile and other screens.

1. Click the gear-shaped menu button in the header.

2. Click Users & System Administration.

3. Click Departments & users.
   

4. In the search box, enter the display name or login name of the user to find the target user.
   You can also expand the department tree and select the target user.

5. Click the Change button.
   

6. In "Primary department", open the dropdown list and select the target department.
   

7. Click Save.