Exchange 2003 Server Domain Role

I installed Exchange 2003 on Windows 2003 member server.  Later on, I ran DCPROMO on that server and made it a domain controller.  I have been running into some problems and finally discovered that running DCPROMO on a server with Exchange 2003 server on it and changing roles is not supported.  I would like to run DCPROMO and make it a member server again.  What do I need to do before I do this?  Will I have to re-install Exchange after demoting this server?  What will I lose?
subjasonthomasAsked:
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SembeeConnect With a Mentor Commented:
Exchange might recover after running DCPROMO, but either way I would run the setup program again and choose reinstall. The only things you will loose is any customisation to things like OWA. Data and settings will remain in place. The services will be stopped during the installation process and then restarted.
You should also re-run the service pack (if you have installed it) so that the files are up to date and you don't have a mismatch of versions.

Simon.
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mikeleebrlaCommented:
i aggree with sembee,,,, it would be better to reinstall both the OS and Exchange (and patch both).  That will "undo" anything you messed up when you ran DCPROMO to make it a DC.
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subjasonthomasAuthor Commented:
Would it be necessary to re-install Windows?  Should a re-install of Exchang do it?  Also, if I re-install Windows or Exchange, will users have to recreate their profiles in Exchange?
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subjasonthomasAuthor Commented:
Correction will they have to recreate their profiles in Outlook?
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mikeleebrlaCommented:
i would reinstall both windows and exchange.  I'm pretty sure you would NOT have to recreate their profiles in outlook as outlook settings are stored on the exchange server. I assume you are going to restore all of the exchange databases from backup,,, so that will also restore their outlook settings.
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rogerhuntCommented:
I ran into this issue today & could not find anything other than reinstalling the OS & Exchange 2003.  I ended up fixing IIS without a reinstall & thought I should share this for others.  It may or may not work but it's worth a try:
1. Open Active Directory & browse to the Users OU.  Right click on IUSR_<SERVER_NETBIOS_NAME>, click reset password, & set a new password for the account.
2. Open up IIS & right click on the Default Website & click permissions.
4. Remove the user account SIDS that are listed.  These are the accounts that were part of the local users & groups before the server was DCPROMO'd.  You can double check the permissions on the accounts before removing them.  These are the same permissions that I have listed below.
3. Add the IUSR_<SERVER_NETBIOS_NAME> account & give it the following permissions:
Remove all allow checkboxes & give the following Special Permissions:
For This folder, subfolders, & files Deny
Create Files/Write Data
Create Folders/Append Data
Write Attributes
Write Extended Attributes
Delete Subfolders and Files
Delete
4. Add the IIS_WPG user & give the user Read & Execute rights & click OK.
5. Right click on the Default Web Site & click properties.
6. Click the Directory Security tab & Edit the Authentication and Access Control.
7. Remove the account listed in User name box & add the IUSR_<SERVER_NETBIOS_NAME> account (browse for it so you get the correct one from Active Directory).
8. Enter the password for the account (that you reset earlier) & click OK.
9. Run iisreset in the command prompt to restart IIS.
Note:  I did this on a temporary Exchange server that I will be reloading in the next week or two & have not yet found any issues.  This may give you a quick fix until the server can be reloaded if needed.
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