SEP 12.1.5 does not update NAC Definitions

Hi,

I've upgraded our Symantec Endpoint Protection Manager to version 12.1.5. Afterward I upgraded some clients. All went well except there a now showing Network Access Control Definitions. The Clients says it's waiting for updates for some days now.. Older Versions of SEP are working well.

The Host Integrity Policy is disabled. When I turn it on and activate the setting the clients will get their updates.

The problem ist I don't want to activate the setting for the productive clients because we had some problems with that in the past.

Can anybody help?