Remove the active directory services My 3rd day server class theory

1.How to remove the active directory services from windows server 2012

 Go to server and log on as admin
                  ||
Open Run Prompt and Type servermanager press enter
                  ||
click on Remove roles and Features 
                  ||
              Next
                  ||
              Next
                  ||
Uncheck the Active the directory services box
                  ||
Click Remove feature
                  ||
Click Demote this Domain Controllers
                  ||
               Next
                  ||
Click on Processed with Remover 
                  ||
               Next 
                  ||
Trick on Remove Dns (domain naming services)
Trick on Remove Application and features 
                  ||
               Next
                  ||
Give Admin Password 
                  ||
               Next
                  ||
         Click on  Remove
                  ||
         Click Demote 


After This process server Machine will be automatically Restarted 
after restarted you can check on administrative tools ..



2.Different between 2k3 &2k8 and 2012 server versions 


2k3 server having 

1. Standard edition 
2. Enterprises edition 
3. Web edition 
4.  Data center edition
 Having 11 roles


2k8 server having 

1. Standard edition 
2. Enterprises edition
3. Web edition
4. Data center edition

2k8 R1 (Release one )  having 16 Roles
2k8 R2 (Release two)   having 17 Roles


2k12 server having 

1. foundation edition   => not supported for vmware support only 15 users 
2. Essential edition      => not support for vmware support only 25 users
3. Standard edition      => support for vmware and limited users depend on users licence 
4. Data center edition => support for vmware and unlimited users

2k12 having 19 roles

Note :
we can able to upgrade in 2k3 to 2k8 with same version but 2k8 to 2012 server only we able go for Datacenter edition only from any version also ...