Raising domain functionality level questions

Hi Everyone,

I'd like to know before I raise my domain functionality level into Windows Server 2003 from Windows 2000 Mixed.

what's your backup plan / roll back and what to expect in the event viewer if it is failed or successful ?

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sameershaikhConnect With a Mentor Commented:
To Raised the domain functionality level into Windows Server 2003 from Windows 2000 Mixed mode.

To activate the new domain features, all domain controllers in the domain must be running Windows Server 2003. After this requirement is met, the administrator can raise the domain functional level to Windows Server 2003.

To activate new forest-wide features, all domain controllers in the forest must be running Windows Server 2003, and the current forest functional level must be at Windows 2000 native or Windows Server 2003 domain level. After this requirement is met, the administrator can raise the domain functional level


1. Back up your domain controllers

While most upgrades go smoothly, there’s the possibility of creating an outage that could affect your entire domain — potentially preventing users from accessing network resources. The more customized your Active Directory schema and permissions, the more likely you are to have problems. Therefore, you should plan your upgrade during nonpeak hours and have a full backup (including System State) of at least two domain controllers in case you need to roll back to an earlier version.

Further,Iam not sure about which event logged,please follow the link below,hope this will help.

yelbaglfConnect With a Mentor Commented:
Here's a good reference to review.

Ensure that you have a system state backup of your DC's.  Here's a guide for backing them up.  This will be your restore plan, if things go wrong, but I have never had any issues with this process.  It either works or doesn't.

Here's a guide discussing best practices for preparation tasks, before the increase.

After you read through the links, ensure you follow the prep tasks and have the proper backups, then perform the increase after hours.
jjozAuthor Commented:
ah yes of course, system state backup.
so if I restore it back on one of my DC then it shouldn't be a problem or do i have to force replicate on the restored DC ?
Making Bulk Changes to Active Directory

Watch this video to see how easy it is to make mass changes to Active Directory from an external text file without using complicated scripts.

I would power off a DC in case you need it to perform an authoritative restore.  If something goes badly wrong, you can use it, and you'll also have your backups, as well.
jjozAuthor Commented:
ok, so in this case i must backup both DC and then restore both of them at the same time ?
yelbaglfConnect With a Mentor Commented:
Create a backup of both DC's, if there are only 2.  Otherwise, refer to the below doc to determine which ones to back up.  Once you have your known good backups of both, power 1 DC off, and then increase your functional level.  Afterwards, power the 'powered down' DC on, as long as everything went well with the increase.

If something went wrong, then you can use your backups to perform a forest recovery.  Here's the guide.

Following these guidelines will ensure you will be able to recover, but I can assure you, as long as everything looks good during the preparation tasks stage, you're gonna be fine.
jjozAuthor Commented:
many thanks guys for your response.
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