Utf-8 filename are ruined when uploading through IIS

I guess we can't use pass-through authentication if the client computer does not stay with same domain. If you use web deploy 1.1, you can try storeCredentials and getCredentials for avoiding put a username and password directly in a command line.

I think the best solution is not to force IIS to deliver the files as UTF-8, but to force IIS to tell the world they are ANSI encoded. Otherwise, it would be necessary an ISAPI filter to perform on the fly conversion of the ANSI encoded files to UTF-8, which may cost a lot of CPU cycles, depending on the number of JavaScript files and the frequency they are accessed.

I recommend adjusting the MIME types configuration on IIS, to force JavaScript files to be delivered as ANSI. To do that, use IIS Manager, go to the server level, click on the MIME Types button, look for ".js" extension and add "; charset=Windows-1252" (without quotes) to the end of the MIME type definition. Again, don't replace the definition, just add the text between quotes and you should fix the problem.