There’s a new (July 2016) Operations Management Suite Pricing and Licensing Datasheet which has full details about the new OMS Subscription. Previously, OMS was only available as an Add-on to existing System Center licences with SA, but the OMS Subscription gives you access to all the Azure services of OMS as well as all of the System Center components for use with 1 virtual machine.

Find the Datasheet in the Core Infrastructure section of our Licensing Guides store: http://bit.ly/MSLicensingGuides.