We are in the process of deploying and testing Lync 2013 in our environment. We have it set up and working in that IM is working, internal and external calls are working, etc. We still need to get Voicemail and Auto-attendants working, which I gather requires the use of Exchange. Our Exchange server is 2010 (SP3 RU 9) and doesn't have UM configured at all. Almost all articles I can find involve integrating 2013 to 2013 or 2010 to 2010. Is there a how-to for how to configure UM and have it work between Exchange 2010 and Lync 2013?
The best I could find was this but he already had Lync 2010 up and going, which meant he already had UM going as well. Need to be able to configure from scratch: http://blog.montopolis.com/2013/02/08/exchange-2010-um-integration-with-lync-2013/