It depends on what you want to achieve.
If you adjust the view to match the window resolution you'll get more actual space to fill and others with a smaller resolution won't see as much as you do.
If you just scale the view, but keep the resolution ratio the same between all clients, then everyone one will see the same thing, some just a bit more scaled up/down.
The third option is to adjust the view, but scale the content. But this gives you more work, since you'll also have to use scaled coordinates vector etc.
As a note: When scaling things you lose quality of the image/texture thus you may want to have different resolutions and swap them at a certain points so you'd get a nicer result.
