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Here’s a quick tip for anyone trying to delete a Web Service Extension in IIS 6.0 on Windows Server 2003.  As you know there are some extensions that don’t have the options of being deleted.

Here’s how to change that.

First you’ll need to download the Internet Information Services (IIS) 6.0 Resource Kit Tools from Microsoft.

You really only need to install the Metabase Explorer but feel free to do a full install as all the tools can be handy to have.

Start up the Metabase Explorer and navigate to to SERVER(local) / LM / W3SVC.  Look for the key named “WebSvcExtRestrictionList”.  On my system it as an ID of 2168 but it might be different on yours.

Double click on the “WebSvcExtRestrictionList” key and a window will open with all the extensions.

Each line’s format follows this basic format (separate by commas):
Status (0 Prohibited, 1 Allowed)
File Name
Delete Flag (0 Can’t Delete, 1 Can Delete)
Service Extension Short Name
Service Extension Display Name

Just click on the extension you want to delete and set that delete flag to 1.  Click OK and exit the Metabase Explorer.  Open up IIS Manager or at least refresh the Web Service Extensions window.  You should now be able to delete the Extension you want.