Alternate access URLs haven't been configured (SharePoint Server)
APPLIES TO: 
2013 
2016 2019 Subscription Edition SharePoint in Microsoft 365
Important
This health analyzer rule only applies to SharePoint 2010 as this was removed in KB4011601 for SharePoint Server 2013 and KB4011576 for SharePoint Server 2016.
Rule Name: Alternate access URLs haven't been configured.
Summary: A default zone URL must not point to the computer name of a front-end Web server. Because this installation has more than one front-end Web server, an incorrectly configured default zone URL can result in various errors, including incorrect links and failed operations.
Cause: A default zone URL is pointing to the computer name of a front-end Web server.
Resolution: Change the default zone URL to a URL that differs from the computer name of any front-end Web server.
Verify that the user account that is performing this procedure is a member of the Farm Administrators group.
On the SharePoint Central Administration website home pages, in the System Settings section, click Configure alternate access mappings.
On the Alternate Access Mappings page, on the Alternate Access Mapping Collection menu, click Change Alternate Access Mapping Collection.
In the Select An Alternate Access Mapping Collection dialog, click the alternate access mapping collection for which you want to change the default zone URL.
On the Alternate Access Mappings page, click Edit Public URLs.
On the Edit Public Zone URLs page, in the Default text box, type a new default zone URL that differs from the computer name of any front-end Web server, and then click Save.