Path Upload folder

Good morning all,


I want to change upload folder from IIS Server to another file server.

Under Fields - Properties - Edit as - File/Image ...

I insert absolut path on IIS Server sample: C:\inetpub\wwwroot\Projekt\file

It works fine.

But ..

If I try UNC Path

\\server\upload\file

It doesn't work.

Virtual path and mapping drive doesn't work, too.

Can anyone help me ?

Thank you - Martin