We do test using the Outlook mobile client for ActiveSync and we did verify that we are able to connect with this latest build. Outlook mobile's architecture as described above by Sébastien can easily become out of sync with any EAS client. If any clients are having problems, I recommend that they resync with the server. The app does include a quick way to for a resync in the Outlook Mobile Settings -> Account -> "Reset Account"
Marc Rainville
Software Developer
SmarterTools Inc.
www.smartertools.com