Microsoft unified communications technologies allow e-mail, voice-mail, faxes, and calendar events to arrive in one inbox, enabling your users to prioritize, color-code and forward your voice-mails and faxes just like any piece of e-mail.
With voice-mail and faxes integrated into Microsoft Exchange Server 2007, you can apply the same programmatic journaling and archiving you use for e-mail retention to all of your asynchronous messaging. Retaining e-mail, voice-mail, and faxes in a central archive resolves many of the compliance issues businesses currently face.
Microsoft unified communications technologies are interdependent solutions. Ideal working environments have a complete build-out of technologies. But some technologies can work on their own.