PureMessage for Exchange 3.1.1 was released on April 9 2012. This is a maintenance release that will include fixes for several outstanding issues and support for additional platforms.
What To Do
You will need to log onto MySophos to download the installer. Prior to running the install, customers are recommended to review the documentation and release notes available from the documentation web page.
No reboots are expected for existing installations. New installations may require a reboot depending on prerequisites for third-party components.