How to update username in AD?

Question

Active Directory

Good afternoon.
There is a user Conference-10, he changed his name to Conf10

What action should be taken, run the command, so that the new name is applied?
For example, by searching for users in Sharepoint 2013, he still finds Conference-10 ...
On the computer, he also sees Conference-10 ...
Something like resetting the AD cache, updating user names ...
Sorry for the incorrect phrases from the eyes of inveterate System administrators!

Answer 1

If two ways (and two names).
One of them is in the tree, through the right button and "Rename".
The second is through a dialog box.
Yes, it is possible to achieve that they will differ.