Some time ago, I worked with CDW to move to Office 365 / Hosted Exchange Server from our on-prem Exchange 2013 server. They had me use Skykick to migrate my mailboxes to the cloud. I don't recall working with them to configure our on-prem Exchange 2013 server in a hybrid configuration.
The on-prem Exchange Server remained online and part of our domain; partly because I was not told by Skykick to decommission it after the migration and partly because I got side-tracked with other projects.
Some time later, I learned that I needed to keep an on-prem Exchange server to take advantage of mail-enabled security groups and other features that were not yet available in a hosted Exchange environment. This was the first time that I learned about a hybrid environment and that Microsoft provided you with a free copy of Exchange to run when using a hybrid configuration.
Fast forward to today, I am deploying a new VM running Server 2016 and Exchange 2016 to replace our old Exchange 2013 server. I was able to get Exchange 2016 installed and also installed Azure AD Connect. It seems that everything synced as my user mailboxes now show up in Exchange 2016.
I am now running the Office 365 Hybrid Configuration tool. I am at the point where the wizard is asking me if I want a "Minimal Hybrid Configuration" or a "Full Hybrid Configuration." I am not sure which option to select. What do you suggest?
I am pretty confident that all of our Exchange data currently exists in the cloud as we have been using the hosted Exchange Server for a number of years. As I set up this Exchange 2016 server in a hybrid configuration, is there any risk of some form of "syncing" taking place that would wipe out all of the data in a user's mailbox that is on the hosted Exchange server?
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