Update: please note that domain rename is not supported by any version of Exchange newer than Exchange 2003.I'd like to introduce a relatively new Exchange 2003 tool called xdr-fixup. It's a handy tool, because it allows Exchange 2003 servers to continue to function after a Windows 2003 domain rename procedure. xdr-fixup is not technically part of Exchange 2003 SP1, but did release at the same time as SP1. Anyway, before this tool released, customers were in bad shape if they renamed a domain with Exchange in the mix. The System Attendant would not start; the resolution was to rename the domain BACK to the original name. On the Windows 2003 CD, there is a new tool called rendom.exe in the \VALUEADD\MSFT\MGMT\DOMREN directory. This tool allows you to rename your Active Directory domain. Why would anyone want to do this? Political reasons, mergers, acquisitions come to mind, but this is not a procedure to undertake at the drop of a hat. See the resources list at the end of this BLOG for more information, but the point here is domain renames are serious business and plenty of planning and lab work should happen before implementing in production. By the way, don't use the version of rendom found on the Windows 2003 CD! There is a newer release found here which fixes at least one nasty bug that most customers wouldn't even hit, but as best practice, always use the latest build. So what does the new Exchange tool xdr-fixup do? It's simply an added step to the domain rename process, a script which generates an LDIF file, which you manually import into AD. It fixes certain Exchange attributes so they reference the new domain name. You can look at the LDIF file and see exactly what is changed. Then you use xdr-fixup to verify the changes and life is good. Of course rendom and xdr-fixup both require certain permissions, and have certain limitations and requirements. In order to successfully rename the domain with rendom.exe, Enterprise Admin rights are required. In order to successfully fix-up the Exchange configuration, the account used must have Exchange Full Administrator permissions at the Exchange organization level. You also need local admin rights on the server you will be running rendom/xdr-fixup from in order to install the xdr-fixup MSI package. Rendom/xdr-fixup requirements:
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