Just give him your login and password, or set up another user with author permissions. I'd suggest authoring while live onsite. Another option would be to "syncronize", when you logon, edit on your computer then update or sync again.
You can set permissions using "server" while live onsite.
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments. After that, you can post your question and our members will help you out.