Good morning!
A question regarding Exchange 2010/2013 coexistence and the Outlook client requirement. I am upgrading and about to install Exhange 2013 into an existing Exchange 2010 Org. The current 2010 Org is patched to SP-3 and Outlook Anywhere is currently disabled. I have Outlook clients that do not yet meet the minimun requirements for 2013 (Outlook 2007/2010). When I install my first 2013 server will it effect the current downlevel clients? The mailboxes are still in 2010 so my thoughts were since the Office upgrade including Outlook has not yet taken place I didn't want to wait for them to at least get 2013 into the Org. The 2013 server should effect the clients until I configure the CAS on 2013 and only when they are at the proper version, is this correct? Does Outlook Anywhere need to be first enabled and configured on the 2010 CAS before I attempt the confgiuration on the 2013 CAS? I just dont want to install 2013 and have Outlook connectivity issues right out of the gate...
Thanks in advance!