Modifications to the group property "Send out-of-office messages to originator" is not detected by Change Auditor.
The group property "Send out-of-office messages to originator" is not tracked by default by Change Auditor.
The "Send out-of-office messages to origintor" property has an AD attribute called "oOFReplyToOriginator". To add it for monitoring via the Administration tab in the CA Client perform the following:
1) Under Auditing | Active Directory | Attributes select "Group" on the right.
2) Under "Schema Class" at the bottom all the attributes should be displayed.
3) Locate "oOFReplyToOriginator" attribute and click "ADD".