Exchange 2013... or 2016?

We just made the decision to purchase 2 new licenses of Exchange Enterprise Edition. Our existing organization is Exchange 2013, and we are using Office365 for our clients, which are Outlook 2016. Our licensing would allow for us to have 3 Exchange Standard servers and 2 Enterprise Edition servers. Has anyone done an upgrade to Exchange 2016 from 2013 who could speak to the pluses and minuses of doing the upgrade? I welcome any feedback from either the technical or the managerial side of things. Considerations include downtime, redundancy (The switch to Enterprise was triggered by the 1TB limitation on dag-enabled databases, and we need two EE servers to make the biggest databases redundant). At the moment, any single server can carry the whole organization, so I can do an upgrade with minimal disruption... But I'd like to know from someone who has done this what to expect... Any advice?
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If you follow Exchange Deployment Assistance the migration will complete without an issue. Also, for correct allocation of resources, review Exchange calculator. The trend is to go a lot of small servers vs. beefy ones. You might find some useful staff in the architecture recommendation.
The recommended maximum for a mailbox copy in DAG is 2TB.

You'll not see many differences between Exchange 2013 and 2016 (15.0 vs. 15.1) but because 2019 will be released in several mothes, going with 2016 would be best approach.

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viktor grantExchange ServersCommented:

I have the same opinion as Ronin. In several months, Exchange 2019 will be launched. So it is always good to be in the latest version of Exchange. In this case I wll recommend 2016.

My experience are very good with Exchange 2016.

it_medcompAuthor Commented:
So it sounds like upgrading to 2016 is the way to go. Thanks!
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