What serves the mail in the first place, and what are the users unhappy with?
Goodlink is Motorola "push" technology for email and RSS on mobile devices.
http://www.good.com/corp/index.php
Exchange Server is Microsoft's back-end email server and mail transfer agent.
http://www.microsoft.com/exchange/default.mspx
Active Sync is Microsoft's synchronization software for mobile devices:
http://www.microsoft.com/windowsmobi...c/default.mspx
Goodlink can work with Exchange Server as the email source, but is not tied to it.
I don't believe Active Sync includes push features.
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Dennis