af7da424_r_Configuration_Page___DocWiki__Description
[Field] Home Server number [Description] 
Enter a unique number that identifies the remote server on all RSNA systems. This same value must be used in the Schedule home server user profile field for users that are local to the server. If you check Reserved Meeting Server: 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