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Exchange Team Blog
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Client Connectivity in an Exchange 2016 Coexistence Environment with Exchange 2010

Ross Smith IV's avatar
Ross Smith IV
Icon for Microsoft rankMicrosoft
Oct 26, 2015
Our goal with this article is to articulate the various client connectivity scenarios you may encounter in your Exchange 2016 designs. To that end, this article will begin with a walk through of a ...
Updated Jul 01, 2019
Version 2.0
Client Access
Exchange 2010
exchange 2016
on premises
Planning and Architecture
Deleted's avatar
Deleted
Dec 10, 2015
Do I need to alter mail flow in co-existence with exchange 2010? I know eventually I will need too, so I can decommission those servers but initially do I need to alter the mail flow and point it at directly at the exchange 2016 infrastructure or will

the exchange 2016 mailboxes be able to send messages to addresses outside of the local organization if only my exchange 2010 hub/cas servers are able to connect to my perimeter mail exchanger?