Hi,
Yes, Correct Onguard license conusmed per devices so if you have 1200 devices you need 1200 onguard licenses, however at the same time 1200 Onguard licenses are for per devices on which we install the Persistent agent or dissolvable agent.
OnGuard license consumption is based upon a per-endpoint model. For example, if the OnGuard persistent agent is to be
installed (persistent agent) or used (dissolvable agent) on five endpoints within a 24-hour period, five OnGuard licenses are
required At the same time, since we do dot1x we use the Access License for the Dot1x authentication with Onguard.
Access license consumption includes 802.1X Authentication, MAC Auth, TACACS, Guest, OnConnect, Security Exchange and Endpoint Profiling,
And You must need an accounting enabled on all of your NAD devices since once we receives the accounting stop we free the license from license pool for every 15 minutes, or else license will be consume for 24 hours and it get freed in next nightly maintenance. So make sure the Accounting is enabled on all the NAD devices in your networks which sending authentication requests to ClearPass.
Answering to your Query.
Yes, you can not order the 700 Access License's as well as 1200 Ongaurd licenses but both you can order only in manner of 100,500,1K, 2500, 5K, 10 on 1,3 and 5 year subscription.