CME can integrate with CUE (voicemail only solution stored on hard disk on a network module or flash disk on AIM.
or Unity (with Exchange). CUE has no relation to Microsoft Exchange 2003.
The new CUE modules can use IMAP to receive voicemails in your email client.
HTH
Sankar Nair
UC Solutions Architect
Pacific Northwest | CDW
CCIE Collaboration #17135 Emeritus