Recently I had a failed Exchange server which I could not be bothered to recover 🙂 When installing Exchange Server, multiple AD system objects and containers are created. When creating new users, it will look to use the Exchange policies previously defined (and stored in AD) to add the required SMTP address attribute to user profiles. Below are steps to manually remove Exchange completely from AD, ensuring AD is clean for future installs.

Navigate to your primary Domain Controller

Open ADSIEDIT

Right Click on ADSIEdit and Click Connect to

Connect to “Configuration”

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

Right Click on ADSIEdit and Click Connect to

Connect to “Default Naming Context”

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

Force the Active directory Replication.

Exchange 2010 Manual Uninstallation is Completed