Forum Discussion
ECP on Exchange 2019 Server doesn't run without an Exchange 2016 Server
I'm in the same situation as I'm sure many others are, migrating from on-prem Exchange 2016 to MS 365, then wanting to replace the on-prem Exchange 2016 Server with an Exchange 2019 Server just for r...
Hi GaryBurch
Did you move all the Arbitration/System and used user mailboxes form 2016 to 2019?
Also, you can check the backend certificate "Microsoft Exchange Server" on Exchange 2019 IIS on port 444.
Thierry_Chapuisat The certificate on the Exchange Back End web site looks OK to me
Do I need to have a database and arbitration/system mailboxes on the on-prem server? Or is it that because they exist somewhere they have to be reachable?
- I haven't moved any mailboxes to the 2019 server, I don't plan on even running a database on that server (or, do I have to keep arbitration mailboxes still).
I haven't done anything with the back end certificates on either server. What am I looking for on there, just that the cert is valid?
