af7da424_r_Configuration_Page___DocWiki__Description
[Field] Reserved Meeting Server [Description] 
Whether the remote server is the RSNA Reserved Meeting Server. If you check this: The Home Server number field is cleared and cannot be modified. In the database, this remote server record is assigned the Home Server number of 777777.
Cisco Unified MeetingPlace, Release 7.0 -- Add Server Configuration Page - DocWiki