The Windows Intune service will be releasing an update to our Windows Intune Endpoint Protection (WIEP) agent beginning on 4/23/2013. Microsoft regularly releases anti-malware platform updates to guarantee consistency in protection, performance, robustness, and usability in a malware landscape that is constantly changing.
Since this is an agent update, computers may have to be restarted after the update is applied; in most cases however, a reboot is not required. To better control when this agent update flows down to your machines, please review your 'Windows Intune client agent mandatory updates installation schedule' policy setting.
The Windows Intune Team