Migration W2016 DCs, Exchange server 2013, AAD Connector 1.4 to W2019DCs

Question

Hello,

I am plannig an upgrade of 2 DCs version windows server 2016 to windows server 2019.

There are also one Exchange server 2013 and another windows server 2008 with AAD Conector 1.4.

I know latest AAD Connector version 2.1.20 requieres at least windows server 2016 and Exhange server 2013 doesn´t support DCs versión Windows server 2019.

The idea is to add new VMs for new servers.

So my question is:

Which are the sequence of steps to do the migration?

Thanks and regards

Answer 1

Bring up a new W2019 Sever for AADConnect ( Not 2016 - its not supported soon!)

https://learn.microsoft.com/en-us/azure/active-directory/hybrid/how-to-connect-install-prerequisites

Do a swing migration:

https://learn.microsoft.com/en-us/azure/active-directory/hybrid/how-to-upgrade-previous-version

You can upgrade Exchange 2013 to 2019 at anytime. Exchange 2013 with the latest CU does support W2019 Domain Controllers:

https://learn.microsoft.com/en-us/exchange/plan-and-deploy/supportability-matrix?view=exchserver-2019#supported-active-directory-environments

What 2013 DOES not support is being installed on Windows 2019 or 2016:https://learn.microsoft.com/en-us/exchange/plan-and-deploy/supportability-matrix?view=exchserver-2019#supported-operating-system-platforms

You can use the Exchange Assistant to upgrade to Exchange 2019 on new W2019 servers:

https://learn.microsoft.com/en-us/exchange/exchange-deployment-assistant?view=exchserver-2019

To upgrade the DCs:

https://learn.microsoft.com/en-us/windows-server/identity/ad-ds/deploy/upgrade-domain-controllers