SiteID 
Definition  Identifies the unique distributed database ID where the row was inserted. Distributed databases are no longer supported so this column is deprecated. 

Build 
Definition  Identifies the build number and patch level of the software that inserted/updated this row. The format is the Build number followed by 3 digits for the patch level which is typically 000. The build number is tied to specific versions of the software, e.g. Sunrise 15.3 is Build 5021, Sunrise 16.3 is Build 5503. 

TouchedBy 
Definition  Information about the user that last updated the row. This will typically be the UserID (IDCode from CV3User table) and may be prefixed with an environment identifier followed by an underscore, e.g. b96d2bf5_jongmore. 

TouchedWhen 
Definition  The date and time that the row was last updated and will be based on the Enterprise time zone. 

CreatedBy 
Definition  Information about the user that created the row. This will typically be the UserID (IDCode from CV3User table) and may be prefixed with an environment identifier followed by an underscore, e.g. b96d2bf5_jongmore. 

CreatedWhen 
Definition  The date and time that the row was created and will be based on the Enterprise time zone. 

MasterCalendarHistoryID 
Definition  Auto generated unique primary key value. 

ResourceID 
Definition  A foreign key to the ResourceID column in the SXAESResource table. 

ScheduleBeginDate 
Definition  Enterprise TimeZone - The begin date for the schedule date range effected 

ScheduleEndDate 
Definition  Enterprise TimeZone - The end date of the schedule date range effected, is null if the range is one day. 

ModificationTypeCode 
Definition  Enum value for the different types of actions that may occur. AddMaster: 1, EditMaster: 2, Exception: 3, RemoveException: 4. 

MasterCalendarType 
Definition  String desc of the master calendar type. 

OldDescription 
Definition  The description of the old setting 

NewDescription 
Definition  The description of the new setting 

IsMasterCalendarActive 
Definition  Indicates the the master calendar that is the subject of the history is active. 

MSrepl_tran_version 
Definition  Optimistic lock identifier. 

MSReplrowguid 
Definition  Unique GUID used to support merge replication. 

IsNeverEndingExternalAppointment 
Definition  column will store if audit details for No End Date Outlook Appointment