As a more general answer, not specifically aimed at your question, Microsoft has a support article which lists all old versions and the operating systems that provide each one.
IIS version Built-in
5.0 Windows 2000
5.1 Windows XP Pro
6.0 Windows Server 2003
7.0 Windows Vista and Windows Server 2008
7.5 Windows 7 and Windows Server 2008 R2
8.0 Windows 8 and Windows Server 2012
Current versions are on Wikipedia
8.5 Windows 8.1 and Windows Server 2012 R2
10.0 v1607 Windows Server 2016 and Windows 10.*
10.0 v1709 Windows Server 2016 v1709 and Windows 10.*
10.0 v1809 Windows Server 2019 and Windows 10.* October
Your security department wants you to do this to make the server type harder to identify. This may lessen the barrage of automated hacking tools and make it more difficult for people to break into the server.
Within IIS, open the web site properties, then go to the HTTP Headers tab. Most of the X- headers can be found and removed here. This can be done for individual sites, or for the entire server (modify the properties for the Web Sites object in the tree).
For the Server header, on IIS6 you can use Microsoft's URLScan tool to remote that. Port 80 Software also makes a product called ServerMask that will take care of that, and a lot more, for you.
For IIS7 (and higher), you can use the URL Rewrite Module to rewrite the server header or blank it's value. In web.config (at a site or the server as a whole), add this content after the URL Rewrite Module has been installed:
<rewrite>
<outboundRules rewriteBeforeCache="true">
<rule name="Remove Server header">
<match serverVariable="RESPONSE_Server" pattern=".+" />
<action type="Rewrite" value="" />
</rule>
</outboundRules>
</rewrite>
You can put a custom value into the rewrite action if you'd like. This sample sourced from this article which also has other great information.
For the MVC header, in Global.asax:
MvcHandler.DisableMvcResponseHeader = true;
Edited 11-12-2019 to update the IIS7 info since the TechNet blog link was no longer valid.
Best Answer
If you want your index document rewritten to the base of the path in the URI, do the following:
-