New Install of Exchange 2016

We currently have users Outlook using IMAP/POP3 and I wanted to know if it's okay to go ahead and Install Exchange 2016 on the Server without switching the Domain until were ready, meaning it should not cause any issues with Users who are currently opening Outlook with IMAP/POP3?
dtssupportAsked:
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Jose Gabriel Ortega CastroEE Rookie/Solution Guide/Topic Advisor and CEO Faru Bonon ITCommented:
The problem with that thinking is that is a bad practice.

if you're working with an exchange server 2010/2013, and then you install an exchange server 2016... they initially it won't impact your users, but the best practices are that you should aim your autodiscover records and flow in a state called "Coexistence" where you can work with the old server but it's pointed via the new server, this means that you should export the SSL and set up the entry points to the server (called them SCP https://gallery.technet.microsoft.com/office/Script-to-configure-the-5a58558b) and after that you do start the migration via move request from any server or even PowerShell. and After that migrated account it will be required to create the profile of the users again.
dtssupportAuthor Commented:
There is no Exchange in the Environment, so it's Brand New First time Exchange 2016 on Windows Server 2016, so that shouldn't  impact any imap/pop3 users using their email domain until we change the Hosted DNS Records correct?
Jose Gabriel Ortega CastroEE Rookie/Solution Guide/Topic Advisor and CEO Faru Bonon ITCommented:
Nope until you get the DNS records in place internally and externally.
Private DNS (the one on your network) => internally
Public DNS (the one on your registrar)  => Externally

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