Remove old server from Active Directory

1. Connect to the domain controler
2. Launch the run dialog (Windows Key + R)
3. Type in the command “adsiedit.msc” et then press “OK”
4. Right click on the console then “Connect to:”
5. In the connexion dialog select “Well known Naming Context”
6. In the drop down menu select “Configuration”
7. Explode “CN=Configuration [domain]\CN=Services\CN=Microsoft Exchange\CN=[organization]\CN=Administrative Groups\CN=Servers”
8. Right click on the dead server and pick “Delete”
9. We also need to delete Database information as well, navigate to “CN=Configuration [domain]\CN=Services\CN=Microsoft Exchange\CN=[organization]\CN=Administrative Groups\CN=Databases”
10. Explode each items to find wich one is related to the old server, then delete it as well.