migrate local Exchange server to newer version after exchange 2010 to office 365 migration with AD sync

I did not understand until after migration I need to keep exchange server locally to manage parts of the office 365 mailboxes but ok with that. My issue is Exchange 2010 is running on windows 2008 which needs to be removed soon. Once I get all the email removed from the user's mailboxes I thought it might be best to bring up a 2013 or 2016 Exchange server with a basic config on Windows 2012 R2 and migrate the email accounts to it. then I can work on removing the 2010 server

Does this sound correct and hate to do it but I do not like OS that cannot be updated?
wwtcoadminAsked:
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MaheshArchitectCommented:
correct
all mailboxes will remain in O365 (already migrated and new mailboxes will be directly created in O365 only), so you don't need mailbox onpremise
As opposed if you want to keep mailboxes at both places, you need to use existing exchange 2010 (which is already purchased) or need to purchase exchange2013 / 2016 officially
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IvanSystem EngineerCommented:
Hi,

you need that local exchange just for managing mailboxes that are migrated. There is no requirement that old exchange is turned on all the time, or have access to internet and so on. In other words, you can keep it turned off, or blocked in your local network, and then use it only when required.

Regards,
Ivan.
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MaheshArchitectCommented:
its better you could add exchange 2013 / 2016 and then decommission exchange 2010
because after some time anyhow you need to uninstall both 2008 server and exchange 2010 as well
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wwtcoadminAuthor Commented:
Yes, I also need an 800 Gb VMare drive to be smaller. The Exchange server is installed on it and would be asking for trouble to shrink it since i am on 5.5 and it is a Thin provisioned drive.
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MaheshArchitectCommented:
you will get exchange 2013 / 2016 hybrid edition free from microsoft as part of O365 enterprise subscription to just keep hybrid exchange, note that you should not create mailbox on this server as it just need to be used for management officially
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wwtcoadminAuthor Commented:
oh so i dont need their old mailboxes just the attributes exchange adds to AD. thanks
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wwtcoadminAuthor Commented:
thanks Mahesh
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