History object

The History object keeps track of activities related to a record. In the UI, history is shown below the record details.

Fields

Label	Field name	Notes
Category	category	Identifies the type of activity. For example: 2 - Updated this case* 4 - Closed this case 11 - Completed this task 25 - Changed field value* (only applies to Audited Fields 29 - Added a note. 61 - Sent mail *Category 25 is used when a case field is modified. Category 2 does not appear to be used. For a complete list, see > Customization > Global Picklists > History Category'
Description	description	Varies, depending on the activity category. For category 25 (audited field modified), the structure is: {#structure-identifier^field-label^old-value^new-value^00005} Example: {#field_audit.recordname_modified_old_to_new ^#fieldlabel.c3a93f70aa004de6aeb5f9073eb1f759.subject ^Original case title ^Revised case title ^000005} (If multiple audited fields were modified during a record update, there is one history entry per field.)
Related To	related_to	{object_id}:{record_id}
History Created By	history_created_by	For an incoming email, the history record's created_by field has the system ID. This field records the ID of the sender, if the from address is recognized.
Submitter Photo ID	submitter_photo_id	The reference ID for the user photo that appears to the left of the activity note in the history.
Enumerated Field Tracker	enumerated_field_tracker	__TBD: Sherwin__
Entity Id	entity_id	Internal. Identifies the source of an activity record that originated outside the system.
Resolved	resolved	not used
Visible to Customer	visible_to_customer	This flag is true for activity notes that are shown in the service portal, where a portal user (as distinct from an internal user) can see them.
Helpful Count	helpful_count	These counts are used for comments on articles posted in the knowledge base, |- where users can vote them up or down.
Unhelpful Count	unhelpful_count
Hours Spent	hours_spent	not used
From User ID	from_user_id	Sender's ID, for outgoing messages
Original Message	original_email_message	Incoming email fields.
Sender Name	from_name
Attachments	attachments
Email Headers	email_headers

Standard Fields

Standard Field Parameters