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Exchange 2010 -> Exchange 2016

I am preparing to introduce Exchange 2016 to my domain this week. 

I have read through the guide but I have a couple of questions:

1. I have an SSL certificate installed on SBS 2011 for SMTP and IIS for mail.mydomain.co.uk - do I need to purchase a second one for the Exchange 2016 server?
2. Can I continue to use mail.mydomain.co.uk on the new server to remove the need for me to update all of my mobile clients?
3. At what point will the users begin connecting to the 2016 server? If my existing Outlook clients are configured to connect to the Exchange 2010 server, will they require an update to repoint them to Exchange 2016?

Thank you  

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• Exchange Server 2016
• SBS 2011
• SSL Certificate

asked10/18/2022 14:32

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1 Answer(s)

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  1

  Hello Ian,

  1. No, you can export the certificate from the SBS and save it as a pfx file. Make sure you include the private key. If you don't have that you need to rekey the certificate at your CA.
  2. On the SBS you have a DNS zone called 'remote.yourdomain.com' and that resolves to the IP address of your SBS. As soon as you have installed the Exchange Server 2016 and done all configuration you can change the IP address of the zone to the IP address of new Exchange Server.

   

  Outlook clients will automatically switch to the new server if all DNS records (public and private) are created. Modern Outlook clients and Exchange Server 2013 heavily depend on autodiscover. So, Outlook will configure itself. There is NO need to do that manually.

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  answered 10/18/2022 14:42

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  Hello, 

  Thank you for the reply, so until I set the DNS to point to the new server, my clients will be unaware, thanks! 

  My clients use Outlook 2010, is that going to cause an issue? 

  Thank you.

  

  Pls, understand as soon as a migration batch is completed DNS must point to the new server. Exchange Server 2010 cannot up proxy but Exchange Server 2016 can down proxy!

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  replied 10/19/2022 12:21

  

  Yes, Outlook 2010 can be a problem on Windows 7 or Windows Server 2008 R2 due to TLS 1.2 issues. Read Update to enable TLS 1.1 and TLS 1.2 as default secure protocols in WinHTTP in Windows

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  replied 10/19/2022 13:48

  

  Hi Mariette,

  Ok, thank you for the insight, I may well update my Outlook clients before the move to Outlook 2013. Back to the Exchange server question, if both servers use mail.mydomain.co.uk, can Exchange 2016 still act as a downstream server?

  Thank you.

  Ian

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  replied 10/21/2022 11:42

  

  Yes, as long as your zone in DNS on the local DNS server points to the new Exchange server and the SCP also. It then resolves to the new server and if a mailbox is still on the old one it will proxy down. The only issue that can mess up this are delegations and public folders as the way 2010 authenticates is different compared to 2016. If this causes an issue change authentication settings on the server to Basic.

  

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  replied 10/21/2022 12:34

  

  Thank you, can you confirm that SCP is please?

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  replied 10/21/2022 13:51

  

  See chapter 9 of the kit

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  replied 10/21/2022 14:28

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  replied 10/19/2022 12:16

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