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When To Do What?

Ok, here is my situation:
I am moving from exchange 2003 to exchange 2010.
I have a few mailboxes moved to the new server, mine being one of them and using outlook 2007. All seems to work fine there. I can send mail to external domains too.
Most users are still on outlook 2003, and only a few of them will need Outlook Anywhere.
I have set up a few test users and configured a laptop with outlook 2003 and one exchange profile, along with 2 pop accounts in the same profile, all works fine from inside and outside the building, except I get an error that outlook 2003 can't download the OAB.  Error is 0X8004010F
Autodiscover works.
Outlook Anywhere works.
OWA works.
I set up a temporary domain we don't use, but we own, and I set the external mx record for it to be my 2010 box, and incoming mail on that domain works.
Mail works internally between my mailbox on the 2010 box and mailboxes on the 2003 box and vice versa.

My questions are:
When should I move the rest of my mailboxes over to the 2010 box?
When should I move my public folders to the 2010 box?
When should I set the OAB to be generated by the 2010 box?

I have nothing in the "C:\Program Files\Microsoft\Exchange Server\V14\ClientAccess\OAB" folder so I really don't know how to tell if it will replicate without the 2010 box being set to generate it.

I think I am almost there, just a couple of things left and I don't want to move things over without making sure everything is ready, and I think the public folders and OAB are the last things to get working.

I have read tons of technet articles and other articles on EE, but I guess I just need to know when enough testing has been done to call it ready and pull the trigger on the final move.

Thanks for all your help so far!

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Delphineous Silverwing

8/22/2022 - Mon
Delphineous Silverwing

You are almost there.  Finish executing your plan and then use the server for a couple weeks to ensure it is stable - witrh no errors or failures - then you'll be ready to migrate your users.  Don't forget to setup your replication of public folders.
Delphineous Silverwing

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