Remove old expansion server

I upgraded from Exchange 2003 to 2010 several years ago. I thought I had properly decommissioned the 2003 server but it still comes back to haunt me now and then.

Recently I noticed the following:
- I go into EMC 2010 and create a new distribution group
- During the setup of this group, I can specify the expansion server
- If I 'browse', a list pops up. I see my OLD (2003) Exchange Server as well as my new (2010 Server)

How can I remove this 2003 server from Active Directory once and for all!

For all I know it's causing other issues.

Thank you.
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Depending on how you removed the old exchange 2003 below I have highlighted the key areas I have seen skipped or missed during the decommissioning. I am assuming here that you have no 2003 exchange server or access to exchange 2003 tools.

Server from AD

1. Open ADSI Edit. Right click on the ADSI Edit and select 'Connect to'.  From the drop down under 'Select a well known Naming Context', select Configuration and click OK
2.Expand the following items:
Configuration Container
CN=Configuration, DC=Domain_Name,DC=com
CN=Microsoft Exchange
CN=Administrative Groups
3.Right-click the Exchange Server 2003 server object, and then click Delete. (DO NOT DELETE THE SERVER CONTAINER, ONLY THE OBJECT)
4.Click Yes in every adsiedit dialog box that prompts you to confirm the deletion.

Old Recipient Update Services
1. Right click on the ADSI Edit and select 'Connect to'.  From the drop down under 'Select a well known Naming Context', select Configuration and click OK
2. Expand Configuration > Services > Microsoft Exchange > Organisation Name > Address List Container > Recipient Update Services
3. Right click on Recipient Update Service (Enterprise Configuration) and select Delete.  There may also be a Recipient Update Service (ORGNAME) this also needs to be deleted

Public Folder Hierarchy

1. Create the new Public Folders container:
Use ADSI Edit tool to locate and expand Exchange Administrative Group object, which can be found at:
CN=Configuration,CN=Services,CN=Microsoft Exchange,CN=Organization,CN=Administrative Groups.
Right-click the Exchange Administrative Group (FYDIBOHF23SPDLT) object, click New , and then click Object .
In the Select a class list, select msExchPublicFolderTreeContainer , and then click Next .
In the Value box, type Folder Hierarchies , click Next , and then Finish .

2. Move the public folder hierarchy:
Use ADSI Edit tool to locate the Public Folders object in Active Directory.
CN=Configuration,CN=Services,CN=Microsoft Exchange,CN=Organization,CN=Administrative Groups,CN=Administrative group,CN=Folder Hierarchies,CN=Public Folders.
In the right pane select CN=Public Folders , right-click and select Move .
In the Move window, expand and select CN=Services,CN=Microsoft Exchange,CN=Organization,CN=Administrative Groups,CN=Exchange Administrative Group (FYDIBOHF23SPDLT),CN=Folder Hierarchies. Click OK .

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SandeshdubeySenior Server EngineerCommented:
ecarboneAuthor Commented:
Thank you MickJackson for your help. Sandeshdubey, although I had previously read through those links, thank you for your assistance.
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