We use Confluence to create documentation. For one of the page and its child pages, I need to give access to the person named 'Nguyen Bich Huong'. But I do not see the person's name in the search box to give access. Here are more details about the issue.
1. On the upper-right corner of the confluence page, click Restrictions apply (the lock icon).

2. On the Restrictions dialog box, type the name of the person you want to give access to. Here, we want to give access to Nguyen Bich Huong.

As you can see in the above screenshot, the name of the person is not appearing for selection.
The person has been given access to Confluence. Yet, I am not able to view the person for selection like how it is appearing in the following screenshot.

The email address of the person is: vcbhuong@vietcombank.com.vn
Regards,
Vitish Pendharkar