We have Cisco VOIP phones and we would like to continue managing calls with Cisco Call Manager. We currently have voicemail on Cisco Unity. We currently have Exchange 2010, but plan to start using Exchange 2013 soon.
However, we would like to migrate voicemail service from Cisco Unity to Exchange Unified Messaging and also want to take advantage of most of the voicemail-related features of UM such as voice to text sent to email, voice mail waiting indicator light on the phones and sending voice mail audio attachments to email.
Is Exchange 2013 Unified Messaging compatible Cisco phones that are managed by Cisco Call Manager?
We have 500 users and 2 Exchange 2010 servers (1 CAS and 1 Mailbox Server). We now have a few Exchange 2013 licenses available in addition to our existing 2010 licenses that are already used on our existing 2 servers. Can we keep the 2 existing Exchange 2010 servers as they are and create a new Unified Messaging server on Exchange 2013 in the same environment or do we need to upgrade all the 2010 servers to 2013 if we use Unified Messaging on 2013?