As platform administrator you can choose whether to enable users to edit their profile or not.
To do so, you must go to Admin Panel, within the People module, and select the option to Configure Permissions.
By clicking on the checkbox, users of the platform are allowed to enter their profiles and complete their information. For example, date of birthday, entry to the company, job title, who reports, etc.
When disabling the checkbox the only one who can complete the information of the profiles is the administrator of the platform.