Where do I find maximum # of attendees?

Having had used GoToMeeting and our organization is transitioning to Ringcentral, GoToMeeting showed you the maximum # of participants you could have for your meeting. This information is essential to be aware of, if you plan on having any meeting where you would need more participants than what you have been assigned by your administrator. Thus far, I have had to validate this information by contacting Ringcentral support, but nothing reassures me that this is truly the case for my account, especially if my administrator changes my plan, without my knowledge.