Contacts in your directory can be given the authorization to edit their own data to allow for any changes to their personal contact information.
1. Under the directory tab, search for the contact you wish to give edit access to and click on the contacts name to open his/her profile
2. Open the contact profile and scroll down to "edit access"
3. Reconfirm the contact by choosing their name from the dropdown. Click on "grant access" and click "save"