Migration to active directory

Hi,
  I would like to know the best migration method ,and steps to migrate from windows NT domain to windows 2000 active directory ,
We have environment with the following specifications :
- More than 300 users on differrent sites (using Win2000 ,winxp ,and winnt )
- PDC and 2 BDCs
- 3 sites Exchange servers 5.5  one of them on BDC
- Windows 2000 DNS server
- Windows 2000 DHCP server
- Serveral NT file/Print servers
After migrating to Active Directory ,we will migrate to exchange 2000

Thanks
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halfaifiAsked:
Who is Participating?
 
Pete LongTechnical ConsultantCommented:
Is there any danger of keeping them on windows NT after upgrade the Domain

No


and what should I do with the BDC server which is also have exchange server .

Dont upgrade this server (the one with Exchange 5.5 on)
Promote another server to PDC and upgrade that one, dont compound your problem by adding in exchange at this time, Exchange is a tempramental beast at the best of times get your domain controller in and the domain upgraded then think about exchange

Pete
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Pete LongTechnical ConsultantCommented:
Hi halfaifi,
To Migrate users

To migrate users from one domain to another (NT to 2K or 2K to 2K)

This is a user manager for NT and Windows 2000 domains. Will download the users and groups from on domain, and then export them onto another domain. Editing features extra.
http://www.planetsourcecode.com/vb/scripts/ShowCode.asp?txtCodeId=37038&lngWId=1

Also See

Moving and Renaming User Accounts
Moving a user account to a different container within the same domain
Moving a user account to another domain
http://www.microsoft.com/technet/treeview/default.asp?url=/technet/scriptcenter/scrguide/sas_usr_aznz.asp

Cheers!
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halfaifiAuthor Commented:
Petelong ,
  Your sugestion is to install win2k domain and move users and groups from the current NT doamin to the new w2k domain.
what about the computer names informations ,are they going to be exported ,or I have to join all the user machines ?

Is threre another simple way ?
Thanks
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Justin CAWS Solutions ArchitectCommented:
If you want to do an in-place upgrade, here's a link:

http://www.microsoft.com/windows2000/en/server/help/default.asp?url=/windows2000/en/server/help/sag_addeploy_17.htm

Basically, you upgrade the PDC first, then BDCs and other servers.  When you have your entire server base upgraded to Win2K, you can switch to Native Mode and take full advantage on Win2K's features.  You'll need all your clients running Win2K or higher in order to take full advantage of Group Policy however.
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Pete LongTechnical ConsultantCommented:
halfaifi,
Yes upgrade the PDC first or promote a BDC that can be upgraded

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halfaifiAuthor Commented:
Sorry for delay , I had one week vacation .

We have some servers on windows NT like Exchange 5.5 server ,and some other servers ,
and some of the clients still on windows NT ,
Is there any danger of keeping them on windows NT after upgrade the Domain ,
and what should I do with the BDC server which is also have exchange server .

Thanks
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Pete LongTechnical ConsultantCommented:
ThanQ
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