There’s no direct statement other than “Messenger for Mac 7.0.2 improves overall quality and conversations with Microsoft Office Communicator 2007 R2”, but I’m assuming this is a required update for a Mac client to connect to an R2 Front-End. Even if it’s not required it sounds like a good idea to have your clients on it.

Download link: http://www.microsoft.com/downloads/details.aspx?familyid=86ae6ab4-f766-4246-831e-dc5dbdbe4757&displaylang=en&tm

Hallelujah. Some decent support for Exchange on the Mac side. Significant changes include:

• Enhanced Autodiscover service to keep user account settings up to date after the account setup.
• Synchronization between Exchange Server and Entourage 2008 Notes, Tasks, and Categories.
• Addition of an Enable Logging (troubleshooting) preference, to log all events that can be used as diagnostic information.
• Use of attachments in Entourage for Exchange calendar events.

At a minimum you need Entourage 2008, but what version of update rollups your Exchange server needs to be at is a little confusing. The blogs say Update Rollup 4, but when you fill out the survey to get in the beta it says Update Rollup 5. I guess I’d go better safe than sorry and assume Update Rollup 5 at this point.

You can sign up for the beta here: http://www.microsoft.com/mac/itpros/entourage-ews.mspx