An update for Outlook Mobile has been released for Windows Mobile 6.1 users who connect to Exchange 2010; users running Windows Mobile 6.5+ do not need this update. This update adds the following functionality to Windows Mobile 6.1:

• E-mails conversation view
• Free/Busy lookup
• Sync text messages to Exchange
• Enhanced Voice Mail, e.g. Unified Messaging voice mail preview

More information with screenshots in the related Exchange Team blog here. When your Windows Mobile 6.1 phone is connected to Exchange Server 2010, you are automatically informed if there is an update.