1. Log in as an admin.

2. Then, click on the top-right icon.

3. Select [Users] from the options.

4. Next, click on [Everyone].

5. Search for the intended user and click on the icon.

6. After that, you may select the group from the Group List.

7. If this warning prompts, please fill in the admin password and click on [Confirm]. If not, then you may proceed to the next step.

8. Lastly, click on the icon.