I am planning a migration from 2007 to 2013. I currently have 1 2007 server with all the roles and plan on doing the same with the new server. I would like to install the 2013 server and have them co-exist for a bit while I move mailboxes.
Here are my questions:
1. If I have the 2013 exchange server installed, but have not moved any mailboxes to it will it affect mail flow in anyway?
2. If I move one user mailbox to new server how does THAT affect their mail flow, and their mobile phone settings?