i installed exchange server 2007 on 2003 server. since i can't register it with my product key I want to uninstall exchange 2007. What do i need to do to uninstall?

I believe this could simply be done in Add/Remove programs.

NOPE!!!! not exactly!!!!!!!!! Get errors!!!!Summary: 3 item(s). 1 succeeded, 2 failed. Elapsed time: 00:00:19 Mailbox Role PrerequisitesFailed Error:Uninstall cannot continue. Database 'Public Folder Database': Exchange is unable to check the public folder replicas for "MRROGERS\Second Storage Group\Public Folder Database". Verify the Microsoft Information Store service is running on MrRogers.Security1st.local, and that the database is properly mounted.Recommended Action: http://go.microsoft.com/fwlink/?linkid=30939&l=en&v=ExBPA.3&id=b6e3b32a-8848-46cb-9567-72288ac15f60 Elapsed Time: 00:00:13 Client Access Role PrerequisitesCompleted Elapsed Time: 00:00:02 Hub Transport Role PrerequisitesFailed Error:This computer is configured as a bridgehead server for 2 routing group connector(s) in the organization. These must be moved or deleted before Setup can continue.Recommended Action: http://go.microsoft.com/fwlink/?linkid=30939&l=en&v=ExBPA.3&id=b35c4602-e6c4-4fcc-873c-31f80a2582e1 Elapsed Time: 00:00:03

Did you perform the recommended actions? What happened?

I looked at the recomendations, but the articles do not contain information on how to revert back to exchange server 2000. I orginally had an exchange server 2000 on an older server. I then installed exchange server 2007 on a new server. but since 07 is not supported in a production environment, I want to undo 07 and revert back to 2000.

As far as I know, there is no rollback option that would allow you to revert to the state of the Exchange 2003 server the way it was before installing Exchange 2007 on it (unless it was imaged... but that might cause problems of it's own).Maybe a migration expert could propose a solution:http://social.technet.microsoft.com/Forums/en-US/exchangesvrmigration/threads

What do you mean about reverting back to exchange 2000? Is there any issue to use the old exchange environment after remove the exchange 2007? For the schema change, I agree with Le Pivert. It can’t rollback to old schema, but it shouldn’t prevent the normal usage of old exchange server, as I know Resource: How to Remove the First Exchange 2007 Server in a Coexistence Scenario James Luo TechNet Subscriber Support (http://technet.microsoft.com/en-us/subscriptions/ms788697.aspx) If you have any feedback on our support, please contact tngfb@microsoft.com