BACKING UP AND RESTORING ACTIVE DIRECTORY (AD)

BACKING UP AND RESTORING ACTIVE
DIRECTORY (AD)
               Back up of Active
Directory is very important. If there is only one DC in a domain network , it
is crucial to take back up of Active Directory. Back up is also important in a
multi DC domain network. Active Directory can easily be restored using the back
up file you have created.
HOW TO TAKE BACK UP OF AD?
           To take back up of AD,
just back up the ‘System State Data’ of the DC.
1. Go
to your DC and in the RUN, type:
              
ntbackup
2.
Click O.K.
3.
Click Next > Back up files and settings.
4.
Click Next > Let me choose what to back up.
5.
Click Next > Click on ‘My Computer’ and select ‘System State’.
6.
Click Next > click on Browse and select a drive to save your backup.
7. Type
filename > Save.
8.
Click Next > Finish.
9. When
back up is completed, write the back up file to a CD/DVD.
HOW TO RESTORE OR RECOVER AD
FROM DISASTER?
                    
If AD gets corrupted, you should reinstall OS and then install AD and then
restore AD using the back up file. To restore AD, we have two methods:
1.
Non-Authoritative Restore
2.
Authoritative Restore
              
In non-authoritative restore, the objects restored in the AD are not replicated
to other DCs in the network but in authoritative restore, the objects restored
are also replicated to other DCs.In a multi DC network, we usually take
authoritative restore.
HOW TO TAKE NON-AUTHORITATIVE
RESTORE?
1. Go
to your DC and delete some users.
2. Now
restart your DC.
3. When
DC starts, press F8.
4.
Select ‘Directory Services Restore Mode’.
5. Type
username as Administrator and password which you have given during running
Active Directory Installation Wizard.
6. Now
click on the back up file and click next.
7.
Select ‘Restore files and settings’.
8.
Click next > Select your backup > next.
9.
Click Finish > O.K.
10.
Restart your DC.
11. You
will get your deleted users.
HOW TO TAKE AUTHORITATIVE
RESTORE?
1.
First take non-authoritative restore.
2.
Restart your DC and press F8.
3.
Select ‘Directory services Restore Mode’.
4. In
the RUN, type cmd and give the following commands one by one, pressing enter at
each command:
                 
Ntdsutil
                 
authoritative restore
                 
restore database
5.
Click Yes.
6.
Restart your DC. 

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