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SeaSenor
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Remove last exchange 2010 server after migration to office 365

I moved all of our users to Office 365.
I have no AD sync running....so everything is separated.

I now want to decommission the last exchange 2010 server. It is sitting idle, and is to be repurposed.
It is a 2008R2 server with Exchange 2010 SP3

First question: Can someone tell me step by step how to do so?
Second question: Will this delete AD accounts? ( I do NOT want to do that)

thanks in advance
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SeaSenor

8/22/2022 - Mon
it_saige

Should just be a simple matter of uninstalling Exchange 2010.  This will not delete AD accounts.

-saige-
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it_saige

Microsoft is never a "simple matter" of anything  :)
True...  But it starts with the uninstall.  If you have any issues with the uninstall then we can work on those till Exchange is removed.  The uninstall will take care of the removal of Exchange specific AD entries.

-saige-
SeaSenor

ASKER
entries such as what besides email address?

Also, I know that i'll need to remove arbitration mailbox etc., before the uninstall but was looking for specific steps to do so.
Do I not need to dismount the database or anything?
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it_saige

entries such as what besides email address?
Entries such as Microsoft Exchange Security Groups, Microsoft Exchange System Objects, Microsoft Exchange, Microsoft Exchange Autodiscover, etc.

As for your question on the Arbitration Mailboxes, this blog discusses removing those as well as Exchange:

http://www.hemangshah.com/?p=140

-saige-
SeaSenor

ASKER
so if I have mail enabled security groups in AD for example, will it delete those groups, or just the email address associated with them?

and isn't removing the "last" exchange server different than just removing one from a group of them?

Also, pardon my paranoia. We have no testing or lab environment so everything is real time... and I need to be absolutely certain that it won't delete any AD groups or users.
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it_saige

No, removing the mailbox does nothing to the active directory user, they are two separate entities.

As for the arbitration mailboxes, try running this CommandLet in the Exchange Management Shell:
Get-Mailbox -Arbitration -Database db1 | Remove-Mailbox -Arbitration -RemoveLastArbitrationMailboxAllowed

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SeaSenor

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I disabled it just prior to the post...  no error.
then tried to remove it, and nothing happened.
Tried to run the get-mailbox and nothing shows up now.

As far as active mailboxes, yes. As mentioned it's just sitting there running as an exchange server (with all mailboxes).
They don't connect to it though. They connect to office 365 now.
So how to get rid of mailboxes or database without removing AD users?
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SeaSenor

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good morning,
yes they were migrated, (which doesn't move the mailbox, just copies it)  then I shut down the exchange server for a while, making sure it was a successful migration. Now it's up and running just sitting there waiting for everything to be uninstalled.

Before I continue, I'd like to ask another question.

Let's say I decide to run dirsync in a few weeks.  
I have disabled all the mailboxes, effectively removing all exchange attributes from AD users/groups.
What happens if directory syncs users? Does it remove their email?
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SeaSenor

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It's hard to say this was excellent... I would have deleted all users had I not guided myself, and would like others who view this to make sure they see that.

but thanks for the help otherwise.
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