Thank you for your post.
The XSLT stylesheet is usually placed in the following location of the host machine where the Web Publishing Engine is installed:
FileMaker Server -> Web Publishing -> xslt-template-files
You can also place the stylesheets in a folder inside the "xslt-template-files" folder.
For more information, please see Chapter 5 of the "Custom Web Publishing with XML and XSLT" manual. This is also available online at: