Moving TO Windows/Exchange 2003 in NATIVE mode.

410 pts.
Tags:
Active Directory
Exchange 5.5
Exchange security
Microsoft Exchange 2003
I've been asked to move a large organization to Exchange 2003 Native domain. I think that I should move the AD domain to 2003 mode first. This org has upgraded some 4.0 PDC's and some 2000 DC's to windows 2003. There are no windows 2000/4.0 DC's left. There are a number of sites. Most clients are XP/Office2003. There are some mac's 10.5 The Exchange Public Folders have legacy, Exchange 5.5 groups in their ACLs Currently there are SID resolution problems in Public Folder ACL's because of some problem with resolving legacy Exchange style "SID's" to AD domain style SIDs My main concern is that when I upgrade either the Exchange org or the Windows domain to native mode, all of the permissions on the public folders will be broken. Can anyone advise on the best approach? Thanks in advance.

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Domain and forest modes only tell you what kind of domain controller is supported in that domain or forest. If all your domain controllers are Windows 2003 then you can change the domain mode to NATIVE with no problem. Same does for the forest. If all domain controllers in the forest are Windows 2003 then you can change the forest level as well.

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  • Golanego
    I would recommend running the NetDiag command on your domain controllers and verfiy the health of Active Direcotry before proceeding.
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  • Wrobinson
    When you migrate user accounts, make sure to include the SID History attribute and when you migrate mailboxes, make sure to include the legacyExchangeDN (X.500) address. This will ensure that users retain access to resources and that old e-mail messages can be replied to.
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