If I open Sharepoint Foundation 2010 Central Administration web and
select Application Management and
click on Manage Applications
I can see all my Sharepoint 2010 applications. But How can I rename one of them? Is that at all possible?
Why do I want this?
By default Sharepoint installed default web site on port 80. I successfully moved it to port 81 (since I need port 80 for something else), but the name remain the same and is very misleading. The name is Sharepoint - 80
.
What is the overall goal you're trying to actually accomplish here? Why do you want to rename it?
Update: Currently there is no way to rename the web app inside SharePoint short of deleting it and recreating it.
This was correctly answered on SharePoint SE where you posted this same question: https://sharepoint.stackexchange.com/a/16672/2881. I have also written up a simplified version of this solution on my blog here: http://thechriskent.com/2012/04/17/renaming-a-web-application-in-sharepoint-2010/
To summarize, this is done with PowerShell using the following commands:
This can be in a script or directly typed into the Powershell management console. Be aware, however, that this will not change the IIS website names or application pools. But these don't need to match for everything to continue working.
You have to change the AAM and IIS Host header bindings. You can also change the web application name.
http://www.sharepointdiary.com/2013/07/how-to-change-sharepoint-web-application-name-and-url.html#ixzz2aAy5eC5y