Decommissioning Exchange 2016 Server
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I have created many labs over the years and never really spent the time to decommission my environment, I usually just blow it away and start again.
So I finally decided to go through the process and decommission my Exchange 2016 server in my lab environment.
My lab consisted of the following:

  • Domain Controller (Windows Server 2012 R2)
  • AAD Connect Server
  • Exchange 2016 Server/ Office 365 Hybrid
  • Office 365 tenant

Being a lab I only had one Exchange server which had the mailbox role configured and was also my hybrid server.
Proceed with the steps below to remove the Exchange Online configuration;

  1. Connect to Exchange Online using PowerShell (https://technet.microsoft.com/en-us/library/jj984289(v=exchg.160).aspx)
  2. Remove the Inbound connector
    Remove-InboundConnector -Identity "Inbound from [Inbound Connector ID]"
  3. Remove the Outbound connector
    Remove-OutboundConnector -Identity "Outbound to [Outbound Connector ID]"
  4. Remove the Office 365 federation
    Remove-OrganizationRelationship "O365 to On-premises - [Org Relationship ID]"
  5. Remove the OAuth configuration
    Remove-IntraOrganizationConnector -Identity "HybridIOC - [Intra Org Connector ID]"

Now connect to your Exchange 2016 server and conduct the following;

  1. Open Exchange Management Shell
  2. Remove the Hybrid Config
    Remove-HybridConfig
  3. Remove the federation configuration
    Remove-OrganizationRelationship "On-premises to O365 - [Org Relationship ID]"
  4. Remove OAuth configuration
    Remove-IntraorganizationConnector -Identity "HybridIOC - [Intra Org Connector ID]"
  5. Remove all mailboxes, mailbox databases, public folders etc.
  6. Uninstall Exchange (either via PowerShell or programs and features)
  7. Decommission server

I also confirmed Exchange was removed from Active Directory and I was able to run another installation of Exchange on the same Active Directory with no conflicts or issues.

Category:
Exchange, Office 365
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Sesha
Guest
Sesha

Could you please expand the Point #6 ?

AJ Bajada
Guest

Yeah sure, there isnt muich to this step, it is really just removing the binaries from the server.

You can litterally open add remove programs and select Uninstall on Microsoft Exchange or use the following PS command.

Setup /Mode:Uninstall /iacceptexchangeserverlicenseterms

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