I saw an advanced user's guide but it was for the M-Files desktop version. I am looking if there's one specifically for M-files online deployment
Could you please elaborate what kind of a deployment you mean here? M-Files Desktop is one of the components of the M-Files Online solution so I didn't quite understand your question. M-Files main components and deployment options are described in the user guide: www.m-files.com/.../system_overview.html