New Exchange 2010; old Exchange 2003.

All mailboxes have been moved to Exchange 2010.

All public folders are replicated to Exchange 2010.

The default public folder database for the Exchange 2010 mailbox store is the Exchange 2010 public folder database.

The Offline Address List Generation Server is the Exchange 2010 server.

Webmail, popmail, smtp, activesync... all configured to work with the new server.  Firewall rules all changed to point to the new server.  Appropriate certificates have been purchased, installed and tested.

If I briefly shut down the Exchange 2003 server, everything seems to work correctly.

What other steps do I have to do before uninstalling Exchange 2003 from the Exchange 2003 server?

asked 11/23/2011 04:07

gateguard's gravatar image

gateguard ♦♦

8 Answers:
Use Add/Remove program and remove the server. That should be enough.


amitkulshrestha's gravatar image


Don't be in a hurry to decommission the old 2003.   Shut down all of the Exchange services and monitor the event logs of the 2010 server for at least a week.   If all is good, remove the databases from the old server (if you're paranoid like me, keep a backup) and then uninstall the 2003.   That should remove it's objects from active directory.  You can verify it with ADSIedit after the uninstall if you'd like.

There is a routing group connector on the new server ("first routing group connector)  that was specifically for the transfer of information between the old server and the new.   Same process.... disable it for a week of so, and if no messages, blow it away.   Routing group connectors don't show up in the console and have to be removed through the shell.   Here's a link:

answered 2011-11-23 at 12:10:18

Mike_Bickford's gravatar image


Mike, thanks for all the detail.  Just one question: you say shut down all the exchange services on the old server and monitor the event logs on the new for at least a week.

Why not just shut down the old server completely and monitor the new server?

Why keep the old server running if I'm shutting down all the exchange server services?

Just curious why you choose to suggest that way.

Thanks again.

answered 2011-11-23 at 12:56:22

gateguard's gravatar image


Follow these instructions from step 11:-

The reason for leaving the server running for a few weeks is that when someone who has been migrated first uses Outlook after migration, it will talk to the Exchange 2003 server first and that will tell Outlook to redirect the mailboxes to Exchange 2010 invisibly.  This won't happen once the server has been switched off.

answered 2011-11-24 at 06:52:26

scriven_j's gravatar image


Hi… I have faced the same situation…

I had shutdown my exchange 2007 server for 14 business days & monitor the newly install exchange 2010 servers.
This will help you to monitor crucial situation after decommission of old exchange. This will also explain you, your application & user level dependency on old exchange.

Thank You.

answered 2011-11-24 at 10:05:03

HemantShinge's gravatar image



answered 2011-11-25 at 00:11:00

praveenkumare_sp's gravatar image


Another reason to keep the server up and running and monitoring it is that any third party software that uses in SMTP server might have the old servername hardcoded into it.

You could get round this by having an alias in DNS which points at the new server, but it is cleaner to identify the mails and point the software generating the mail at the new Exchange server.

answered 2011-11-26 at 03:03:31

scriven_j's gravatar image


It's up and running with the services turned off.

It's been that way since 11/24.

I'm going to follow the decommissioning steps very soon.

answered 2011-12-01 at 06:55:21

gateguard's gravatar image


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Asked: 11/23/2011 04:07

Seen: 425 times

Last updated: 12/15/2011 02:57