Decommissioning Exchange 2010 RRS feed

  • Question

  • Hi Experts!

    Our client is already switched to exchange 2016 and they want now to decommission the old one which is exchange 2010 version. Now, I have some few question to discussed with the client before doing decom in exchange 2010. Can you also give us the procedure in decommissioning exchange 2010 as well. 

    1. What are the best practices and step by step procedure in decommissioning exchange 2010 ? 

    2. What are the prerequisites and requirements before initiating decom?

    3. When you say, decommissioning exchange 2010 is it the whole exchange (database, Mailbox, Dag, all configuration etc.?)

    4. Does it affect the exchange the current exchange 2016 ,Policy, AD security groups, Authentication) ? 

    5. Does it affect also the IP configuration on AD integration ? 

    6. How we can prevent data loss during decommission ? 

    7. Are you recommending to create send received connectors on the exchange to make it sure that no affect?

    8. Check the arbitration to validate if system files are properly transferred.

    9. Off/shutdown exchange 2010 then observe at least 1week to determine if they have some issue encounter.

    Are you recommending the below procedure in decommissioning exchange 2010 ? Please advise ... 

    Manual Method of Exchange Server Decommission

    Therefore, it is better to go for manual process of Exchange Server Decommission in order to continue working with the newer version smoothly. Here’s a quick look through the steps that will reverse all the changes occurred:

    1. Locate the Primary Domain Controller
    2. Open ADSIEDIT
    3. Right-click the ADSIEdit and proceed with Connect to
    4. Further to Connect to, go for the “Default Naming Context” option
    5. You will find the following objects
      DC=Domain,DC=Com -> OU=Microsoft Exchange Security Groups
      DC=Domain,DC=Com -> CN=Microsoft Exchange System Objects
    6. Simply delete these objects
    7. Again, Right-click the ADSIEdit and navigate to Connect to
    8. Go to the “Configuration” through Connect to
    9. You will again find some objects to delete
      CN=Configuration,DC=Domain,DC=Com -> CN=Services -> CN=Microsoft Exchange
      CN=Configuration,DC=Domain,DC=Com -> CN=Services -> CN=Microsoft Exchange Autodiscover
    10. Delete these as well
    11. Then, force the replication of Active directory
    12. And, your Exchange Server 2010 manual uninstallation will be completed

    Homer Sibayan

    Wednesday, September 11, 2019 1:47 AM

All replies

  • Hi

    ADSIEdit should be the last resort, you should always uninstall exchange from programs and features. If you remove the wrong instance in ADSIEdit, well you pretty much bring down the org.

    Better would be to recover an exchange server and then uninstall it as mentioned.

    Hope this helps. Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

    Wednesday, September 11, 2019 6:58 AM
  • Hi Homer,

    Agree with Edward van Biljon, and add more information about your questions:

    1.  Here are some points you have to pay attention to when try to uninstall the Exchange:

    • Delete all mailboxes and remove Mailbox databases.
    • Delete public folders and remove Public Folder databases.
    • Remove Offline Address Book.
    • Make sure the server to uninstall is not used as a Source Server on any Send Connector.
    • Uninstall other third-party agents or software based on Exchange features, such as Antivirus, Backup, Monitoring.
    • Don’t forget to check your DNS records which have relation to Exchange 2010.
    • Then you can uninstall Exchange 2010 from Control Panel.

    This is a blog about Decommissioning Legacy Exchange Servers, you can check it for more details.

    2.  Check the blog provided above, and make sure Exchange 2010 won't be used any more.

    3.  Yes, uninstalling the Exchange server will remove the whole server from your organization.

    4.  Before decommissioning the Exchange server, we have to make sure no configurations or services will use Exchange 2010 anymore. Then you can turn off Exchange 2010 for some days to see if it will affect your users.

    5.  You have to check and change the DNS records. No records should be pointed to Exchange 2010.

    6.  You can make a full backup of your organization.

    7.  Since Exchange 2010 won't be used any more, send and receive connectors should be created on Exchange 2016. 


    Lydia Zhou

    Please remember to mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact

    Thursday, September 12, 2019 7:22 AM
  • Hi,

    Did you get help from above suggestions?

    If you need further help, please feel free to reply this post directly so we will be notified to follow it up.


    Lydia Zhou

    Please remember to mark the replies as answers if they helped. If you have feedback for TechNet Subscriber Support, contact

    Wednesday, September 18, 2019 1:19 AM