Are you using Delegates or the permissions tab on the properties dialog?
If there is a real limit, its well above 4 - I know of sites where thousands
have permission to view a calendar. There is a practical limit for managing
individual users but this can be worked around by giving permission to
security groups.
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.