To backup a database to a network resource, the mssqlserver service will have to have premission to write to that resource. Once the service has the proper permission, you should be able to access the network resource using either unc or a mapped drive. Just remember that everything happens from the service's POV, not yours.
-Mike
>I need to backup a database to disk. I'm fine on my machine, but can't get the right info to backup to a drive on the network. The end result of what I need is to be able to take a database on a server and backup to the server drive or the local drive.