Uninstall Exchange 2010 binaries from Server A. Disjoin server from the domain. remove any remnants from ADSIedit if needed. Are there any references in AD to Public Folder databases that need to be manually cleaned up after deleting the database object itself (other than the references to it in the msExchHomePublicMDB attribute of mailbox 1. Re-point your organization's MX record to the Office 365 service if it is pointing to the on-premises organization. If you are removing Exchange and don't point the MX record to Office 365, inbound Internet mail flow won't function. 2. Using the Shell in the on-premises organization, run the following commands: Remove Launch Server Manager. Navigate to Roles > Active Directory Domain Services > Active Directory users and Computers > > Microsoft Exchange Security Groups. From the list of In the MS Exchange Server 2007 and Exchange Server 2010, many new groups are created "Microsoft Exchange Security Groups", a new organizational unit which is located in the forest's root domain. So, when you want to decommission the Exchange Server and uninstall it, some of these changes are required to be undone manually. Open regedit.exe; Navigate to HKEY_LOCAL_MACHINESOFTWAREClassesInstallerProducts The subkeys of this key are a bunch of letters and numbers. Go through these keys are remove the ones which have "ProductName" equal to GFI MailEssentials for Exchange/SMTP.; Do the same for the following key: HKLM SOFTWAREMicrosoftWindowsCurrentVersionUninstall the "best practice" recommendation is to just disable the services for exchange (And remove the autodiscover stuff if needed) and move on with SBS until you get it totally retired. Going to uninstall it is going against the license agreement (SBS is sold as a bundle, and breaking up the bundle is counter to the agreement). I have a corrupt exchange 2010 deployment running on Server 2008 R2 - I cannot get into the EMC or the Shell for maintenance and when I try and uninstall through add/remove it fails all the Prerequisite checks. It is a single server deployment so it runs on the DC. How do I manually uninstall the exchange 2010 instance. You need a subscription Here is the way how to do it: You will have to open ADSIEDIT.MSC from one of your Domain Controllers and then navigate to the Server Name. Path would be. Configuration -> Services -> Microsoft Exchange -> { Name of Your Organization } -> Administrative Group -> Exchange Administrative Group -> Servers -> { Your Server Name } I have downloaded and tried the office uninstall.exe--did not work This thread is locked. You can follow the question or vote as helpful, but you cannot reply to this thread. You can use ADSIEdit to remove exchange server: Go to Windows Run, type ADSIEdit.msc and click "Run". Right-click on ADSIEdit and choose the "Connect to.." option. give the name as "Configuration" and click OK. On the left hand pane, expand Configuration , This will display all the servers on the right hand pane. Launch Active Users and Computers. Remove the EUQ accounts and mailboxes for the Exchange Server. Delete ScanMail from the Start menu. For example: C:Documents and SettingsAll UsersStart MenuProgramsTrend Micro ScanMail for Microsoft Exchange. Delete all files and subfolders in the folder in the folder where ScanMail is installed.