How to block autodiscover/autodiscover.xml access globally on a cPanel server

Introduction

You may want to completely block access to autodiscover/autodiscover.xml and can be done so with some Apache directives.

Procedure

Modify /usr/local/apache/conf/includes/post_virtualhost_global.conf and add:

Alias /htdocs_autodiscover /usr/local/cpanel/htdocs/
ErrorDocument 404 /htdocs_autodiscover/404.shtml
RedirectMatch 404 ^.*[a|A]utodiscover.xml$

and then restart Apache with

/scripts/restartsrv_httpd --hard