The ServiceNow Connector supports the following versions of Oracle Enterprise Manager and ServiceNow:
Oracle Enterprise Manager Cloud Control 13c Release 1 (13.1.0.1.0) and Release 2 (13.2.1.0) and later versions.
Oracle Enterprise Manager Cloud Control 12c Release 4 (12.1.0.4.0) and later versions.
Visit My Oracle Support for list of supported ServiceNow releases.