This is on a Exchange 2013 installation. Is there an official Technet article or white paper that states the amount of conference rooms that are displayed to an OWA client when trying to "Add a room" to a meeting? We currently have over 200+ conference rooms and when clicking on "Ad a room" I only see 100 conference rooms. The view only shows what is available so I try and schedule a meeting on Saturday or Sunday when no one has booked those rooms and I only show 100 meeting rooms. Reading the OWA help states the following:

Enter a location, or select Add a room to see a list of available conference rooms from your organizations address book. Select Scheduling Assistant to show the calendars of attendees. You can also add or remove attendees and automatically schedule resources such as conference rooms.

It does not mention anything regarding the view being limited to 100 conference rooms. I have searched for some sort of documentation that states OWA only shows 100 conference rooms but cannot find anything. Anyone have any ideas as to where I may find this stated somewhere?