This pretty much is how our system works. The server is restricted as to who can write to it (ISO rep, Factory Director, Network Admins) everyone else has read-only access. ALL documents are password protected and in either Word, Excel, or PowerPoint format (only ISO rep has password). Servers are backed-up nightly and stored off-site.
The only documents that have signatures, per Factory Director's request, are the master printed Quality and Environmental Manuals (signed by FD and QC or EHS manager). The footer of all printed documents state it is "uncontrolled when printed", revision date, and document title.
This process has passed at least six CB audits.