Important Note:

Exchange 2010 Manual Un-Installation is UN-SUPPORTED.

The Best way to Remove Exchange 2010 is Uninstall it from Add/Remove Programs.

This will COMPLETELY REMOVE ALL Exchange related objects from Organization Completely.

As It will Remove all Exchange Related Active directory Objects , None of the Exchange related stuff will work after you complete the following Manual Un-Installation.

Please don’t follow in case you have any working exchange server ( 2000,2003,2007 or 2010) in your Organization.

Prepare for Manual Un-Installation:

1. Take System State Backup of your Active directory

2. Take Exchange Database Flat file Copy (OR) Backup

3. Make a Note of All your Mailbox Database names, Organization names, MRM Details, MRM Retention Tag Details, MRM Retention Policy Details, OWA Mailbox Policy details, Exchange Active sync Mailbox Policy details, Email Address Policy Details, Transport Rules, Journal Rules, Send/Receive Connector Details, Global Settings, UM Settings etc.

4. Run ExBPA Report and Export the Report for future reference.

5. Go to Registry Editor and Export “My Computer” as Registry backup.

Remove Binaries, Registry from Exchange Server:

1. Go to Exchange 2010 Server

2. Make Sure Exchange management Console and Exchange Management Shell are Closed.

3. Go to Services.msc

4. Right Click on “Microsoft Exchange Active Directory Topology Service”.

5. Go to Properties.

6. Stop the Service. Make the Startup type “Disabled”

7. Click ok.

8. Stop and Disable All the Exchange Related Services below in the same method.

            Microsoft Exchange Address Book

            Microsoft Exchange Anti-spam Update

            Microsoft Exchange EdgeSync

            Microsoft Exchange File Distribution

            Microsoft Exchange Forms-Based Authentication

            Microsoft Exchange IMAP4

            Microsoft Exchange Information Store

            Microsoft Exchange Mail Submission Service

            Microsoft Exchange Mailbox Assistants

            Microsoft Exchange Mailbox Replication Service

            Microsoft Exchange Monitoring

            Microsoft Exchange POP3

            Microsoft Exchange Protected Service Host

            Microsoft Exchange Replication Service

            Microsoft Exchange RPC Client Access

            Microsoft Exchange Search Indexer

            Microsoft Exchange Server Extension for Windows Server Backup

            Microsoft Exchange Service Host

            Microsoft Exchange Speech Engine

            Microsoft Exchange System Attendant

            Microsoft Exchange Throttling

            Microsoft Exchange Transport

            Microsoft Exchange Transport Log Search

            Microsoft Exchange Unified Messaging

            Microsoft Search (Exchange Server)

Refer to:

Overview of Services Installed by Exchange Setup 

http://technet.microsoft.com/en-us/library/ee423542.aspx

9. Restart the Exchange Server.

10. Go to Registry Editor.

11. Navigate to the following registry entries and delete them.

COMPUTER ->HKEY_LOCAL_MACHINE ->SOFTWARE -> MICROSOFT -> EXCHANGE

COMPUTER ->HKEY_LOCAL_MACHINE ->SOFTWARE -> MICROSOFT -> EXCHANGESERVER

COMPUTER ->HKEY_LOCAL_MACHINE ->SYSTEM ->CURRENTCONTROLSET ->SERVICES ->MSEXCHANGE* (Everything Starts with MSExchange)

COMPUTER -> HKEY_CURRRENT_USER -> SOFTWARE -> MICROSOFT -> EXCHANGESERVER

11. Open Windows Explorer.

12. Navigate to %Program Files%Microsoft

13. Rename “Exchange Server” Folder as “Old Exchange Server”

14. Restart the Exchange Server.

15. Download the Windows Installer Clean up utility from the below link

http://download.microsoft.com/download/e/9/d/e9d80355-7ab4-45b8-80e8-983a48d5e1bd/msicuu2.exe

16. Install it in the Exchange Server and Open it.

17. Remove the Microsoft Exchange Related Products. Ex.

            Microsoft Exchange 2007 Enterprise Anti-Spam Signature

            Microsoft Exchange 2007 Enterprise Block List Update

            Microsoft Exchange 2007 Standard Anti Spam-filter Update

            Microsoft Exchange Client Language Pack

            Microsoft Exchange Server

            Microsoft Full Text Indexing Engine for Exchange

            Microsoft Exchange Full text indexing Services

18. Restart the Exchange Server.

Removing Active Directory Objects:

1. Go to Primary Domain Controller

2. Open ADSIEDIT

3. Right Click on ADSIEdit and Click Connect to

4. Connect to “Default Naming Context”

5. Navigate to the following objects and Delete them.

DC=Domain,DC=Com -> OU=Microsoft Exchange Security Groups

DC=Domain,DC=Com -> CN=Microsoft Exchange System Objects

6. Right Click on ADSIEdit and Click Connect to

7. Connect to “Configuration”

8. Navigate to the following objects and Delete them.

CN=Configuration,DC=Domain,DC=Com -> CN=Services -> CN=Microsoft Exchange

CN=Configuration,DC=Domain,DC=Com -> CN=Services -> CN=Microsoft Exchange Autodiscover

9. Force the Active directory Replication.

10. Exchange 2010 Manual Uninstallation is Completed

Article taken from Satish !

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