We are migrating from Unity 5x Voicmail Only to Unity 5x Unified Messaging (with Exchange) 5x.
I'm have some Unity 5x Voicemail Only users that don't have an Outlook/Exchange mailbox.
I don't want to burn an Exchange CAL for these voicemail only mailboxes, so I'm trying to understand what options we might have under Unity Unified Messaging (with Exchange 5x)
Can I use Internet Subscribers or something else to provide them with voicemail.