RE: [ActiveDir] Migration : NT to Win 2k3 Active Directory

Thu, 24 Jul 2003 07:52:27 -0700

Title: Message
4) Mixed mode vs 2003 Interim Mode : we have placed the upgraded domains into 2000 Mixed Mode. If someone can tell me the advantages of 2003 Interim Mode, please. We spoke to Microsoft about their reasons, and they didn't really have anything compelling.
 
When switching only the domain mode to 2003 interims, your benefit is minimal: some improvement on replication (mainly different compression algorithm), but you also keep any other admins from adding Win2000 DCs to your domain (which just add an obstacle to make the switch later on).
 
When also switching the forest mode to 2003 interms, your main benefit is Linked Value Replication (LVR) which doesn't only improve speed of replication of your group memberships (incl. ensuring no overwrites by multiple admins and allowing very large group > 5000 members), but if you're in a single domain, it also is very benefitial for Disaster Recovery scenarios. With LVR, authoritative restores of deleted/tombstoned objects will also revive the group-memberships (links) - which is not the case for the Windows 2000 style replication (i.e. the mode used prior to switching to Interims or 2003 forest functional level). 
 
/Guido

From: Richard Boswell [mailto:[EMAIL PROTECTED]
Sent: Donnerstag, 24. Juli 2003 15:51
To: [EMAIL PROTECTED]
Subject: Re: [ActiveDir] Migration : NT to Win 2k3 Active Directory

I am just now finishing a NT/Novell 4.11/E5.5 to W2K3 AD/E2K3 migration and is was very similar to a W2K migration. I used the docs in the previous posts, but we found some interesting new caveats.
 
1) Site links : for many environments, the site link costs would stay the same (the default 100), either due to the WAN configuration (such a central access point with sites radiating from it) or due to ignorance. We have found that the default setting in W2K3 doesn't always replicate properly, therefore if you discover any replication issues that you can't explain, split up the site costs based of off WAN load or server capacity.
 
2) NT BDCs : there is a registry entry that we have found that should be added on the PDC and any other NT-based DCs that you plan to upgrade to W2K3. Once the upgrade/migration has occured, all of the W2K Pro and later clients will ONLY log in on the newly upgraded PDC emulator. The reg entry will take care of this. It is located at HKEY_Local_Machine\System\CurrentControlSet\Services\Netlogon\Parameters, add a new value called NT4Emulator, make it a REG_DWORD, and set its value to 1.
 
3) WINS and LMHOSTS : yeah, this is a "duh" one but one that a lot of people don't think about. Make sure that you know what static WINS entries there are and that the LMHOSTS or HOSTS file point to the CORRECT entries. (I would recommend staying as far away from both of these as you can, but there are obvious situations in which one would be required).
 
4) Mixed mode vs 2003 Interim Mode : we have placed the upgraded domains into 2000 Mixed Mode. If someone can tell me the advantages of 2003 Interim Mode, please. We spoke to Microsoft about their reasons, and they didn't really have anything compelling.
 
5) The usual AD-prep stuff : Use the guides that the other posts denoted, the 2003 migration/upgrade path is similar to 2000.
 
We drew info from our test labs, Microsoft's MSA docs, Mastering Windows Server 2003 by Mark Minasi, the Microsoft Migration forum on msnews (the one that Daryn posted). We also checked kbAlertz everyday for new and exciting "challenges" that Microsoft had posted. All in all, the client is extremely happy, and the new OWA/OMA is awesome. If you need any Exchange info, let me know, there are some things that we discovered there also.
 
Hope that helps.
 
Richard Boswell
Senior Enterprise Engineer - AD/eDir SME
Sarcom - Nashville
Office 615.232.7467
Nextel 615.445.5944 / Direct Connect 148*145792*2
AOL IM : bswrchrd
----- Original Message -----
Sent: Thursday, July 24, 2003 5:31 AM
Subject: RE: [ActiveDir] Migration : NT to Win 2k3 Active Directory

I meant to include this also -
 
 
(This is a new newsgroup that was set up recently. The MS Community website ( http://www.microsoft.com/windows2000/community/default.mspx ) was hosting it for a while, but for some reason no longer.)
 
 
regards
dar
 
 -----Original Message-----
From: Hughes. Daryn (IT Solutions)
Sent: 24 July 2003 10:37
To: '[EMAIL PROTECTED]'
Subject: RE: [ActiveDir] Migration : NT to Win 2k3 Active Directory

Here's a few Microsoft links I came across recently -
 
Windows Server 2003 Resources - Microsoft links page - http://www.microsoft.com/technet/treeview/default.asp?url="">
 
Migrating from Windows NT Server 4.0 to Windows Server 2003 - (a seven chapter book than can be downloaded individually or in a complete zip of around 5MB in size) - http://www.microsoft.com/downloads/details.aspx?FamilyID=e92cf6a0-76f0-4e25-8de0-19544062a6e6&DisplayLang=en
 
 
I'd also still recommend the Domain Migration Cookbook, even though its focus is on W2K. There is an updated version of this that includes the new features of ADMT2, but the document is unfinished and might not be on general release yet  - http://www.microsoft.com/technet/treeview/default.asp?url="">
 
regards
daryn
 
From: [EMAIL PROTECTED] on behalf of Sharma, Shshank
Sent: Wed 7/23/2003 4:34 PM
To: '[EMAIL PROTECTED]'
Subject: [ActiveDir] Migration : NT to Win 2k3 Active Directory

Hi,
 
What would be a good reference for migrating from an NT domain to Win2k3 Active Directory ?
I'm looking for a HOW-TO document.
Also, any peculiar experiences, things-to-watch-out for would be very useful too.


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