System Center 2012 Virtual Machine Manager SP1 and above (VMM 2012 SP1+, VMM 2012 R2+) enable a new, event-based triggering system for host refresh. This replaces previous push-based models that were based on intervals specified in the Registry. In general, this model is recommended as it ensures faster consistency and less data to notify the Virtual Machine Manager server of changes.
In some cases the refresher model may not be automatically set on VMM hosts. To update host machines, see the information in the following KB article: