cant edit work mail in central admin

Question

In the admin site (https://-admin.sharepoint.com/), click on User Manage Profile Service: User Profile Service Application> Manage User Properties search Work email. Scroll down to find Work email, and not able to edit it.

My problem is to map the mail for user profile, because i'm getting this error:

The following users do not have e-mail addresses specified:

Answer 1

1. open SharePoint center admin.
2. Click on Manage service applications.

3. Click on User Profile.
4. then click on Manage User Profiles
5. then Find your user Name
6. Right click on your User & Edit My Profile.
7. Edit user Profile & save it.

Answer 2

If you are using IE11, you will need to add the CA site into your Compatibility View settings list. IE11 doesn't play nice with UPA by default. The dropdowns should re-appear after this., now it works fine