Home page files for a database are stored in the database, and managed in MI:Admin with the Schema tool.
When new or modified database home pages have been uploaded to the database in MI:Admin, the updated files must be copied (or "fetched") from the database to the MI:Viewer application server in order to make them available to MI:Viewer users. Users with system or database Admin privileges can do this from the Admin > General page in MI:Viewer.
C:\Inetpub\wwwroot\mi\homepagefiles\<database key>
For example, the home page for the MI_Training database in a typical installation will be located in:
C:\Inetpub\wwwroot\MI\homepagefiles\MI_Training_11.0.0.
The structure of files and folders will be reproduced in the MI:Viewer folder when the home page is copied into the MI:Viewer. The folder is published as a standard web folder.
Note that any files that were previously in the homepagefiles subfolder will be deleted when the new files are copied in.
The GRANTA MI:Viewer Home Page Author Guide describes how to create home page files for databases, profiles, and for the MI:Viewer application. This document can be accessed from the Help menu.