Using Bridge on server

Sort of. Bridge has almost no shared features. Keywords and labels are stored within the actual graphics files. Collections cannot be shared.

Although I can't speak for your set up, I, and 5 other Mac users, use Bridge extensively for searching a network share and it works OK 99% of the time.

It's actually more reliable than using the Mac Finder I find, and although Adobe 'doesn't support opening files from a server', I have found no problems, other than the very occasional error, "cannot open file to as it's already open', which goes away after a couple of attempts.

Set up is:

Mac Pro Tower running SoftRAID 1+0 acts as a server, and runs the client version of MacOS (Yosemite), the Spotlight index is managed by this Mac automatically.

The 5 clients run High Sierra and access the server using the same account on that server, so permissions are the same for reading and writing to the server.

We search for files using bridge (making sure to select Spotlight searching, so it accesses the spotlight index on the networked Mac).

We don't use the Bridge Cache.

We add keywords to the files on the server using a centrally agreed set of keywords which we review periodically.

We only use keywords, but I see no reason as to why collections, labels and rating of files shouldn't work also.

The occasional issue with Bridge not finding a file is solved by just restarting Bridge or reconnecting to the network share on the Mac.