Upgrade or Migrate from Hybrid exchange 2013 to 2019

Question

Looking for the best possible way to upgrade and or migrate our current two hybrid exchange 2013 environment to exchange hybrid 2019 please.

Answer 1

@Chad Rodriguez

You just need to create a new Exchange 2019 coexists with Exchange 2013. Then configure external virtual directories for Exchange 2019 from Exchange admin center:

Then enable MRSProxy for Exchange 2019:

Get-WebServicesVirtualDirectory | Set-WebServicesVirtualDirectory -MRSProxyEnabled $true  

After that, you could rerun HCW to switch hybrid end point from Exchange 2013 to Exchange 2019.

Finally, you could change the public DNS record point to Exchange 2019 server if you want.

The Exchange Deployment Assistant could provide detailed steps for you to deploy Exchange 2019 coexists with Exchange 2013.

If you have migrated mailboxes and DNS record to Exchange 2019, you could uninstall Exchange 2013 if you want.

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Answer 2

@Chad Rodriguez

I am assuming that you are already hybrid on 2013 and just wanted to add 2019 servers...

Did you complete this upgrade and did you have to run the HCW?

Thanks