Trying to remove Mailbox Role in 2010

Hello,
I am trying to remove the Mailbox role from my server.  I have removed all hidden mailboxes except for one.  When I try to remove the last arbitration mailbox on the server, I receive this error:

Exchange can't remove the arbitration mailbox "xxx"" because it's the last one in the organization.

I have already installed a new mailbox role server so I am confused why this is happening.  Also, I did a search for the discoverysearch mailbox on the new server but it was not created.  Should I have moved the mailbox to this server as well as the other arbitration mailboxes instead of deleting them?  If so, how do I recreate them?  Thanks.
henryataaAsked:
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Justin DurrantSr. Engineer - Windows Server/VirtualizationCommented:
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henryataaAuthor Commented:
Thank you.  This should do it for uninstalling from the old server but will I need those mailboxes on the new server?  I had assumed that they would be recreated on the new server but I installed the new server before I removed the mailboxes.  Should I have done the step explained in the link first, then have installed the new mailbox server so the mailboxes got recreated?  If so, should I remove the mailbox role from the new server then run the command on the link, then reinstall the mailbox role on the new server to recreate those mailboxes?
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Justin DurrantSr. Engineer - Windows Server/VirtualizationCommented:
move them:

Move:
Get-Mailbox -Arbitration -Database db1 | New-MoveRequest -TargetDatabase db2

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Satya PathakLead Technical ConsultantCommented:
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henryataaAuthor Commented:
OK,
But what about the ones that I have already deleted?  How do they get recreated?
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Justin DurrantSr. Engineer - Windows Server/VirtualizationCommented:
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henryataaAuthor Commented:
OK,
So I am going to uninstall the server role from my new server so that Exchange 2010 is not present.  Then I am going to run the command:

get-mailbox -Database "xxx" -Arbitration | remove-Mailbox -Arbitrary -DisableLastArbitrationMailboxAllowed

Then I can uninstall the mailbox role from my original server.  Keep in mind that I still have the CAS and Hub roles on different servers as we are in Exchange 2003 coexistence.

Then I will run setup.exe /preparead

Then I will install the mailbox role on the new server.

Does this sound like the correct plan of action?
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Justin DurrantSr. Engineer - Windows Server/VirtualizationCommented:
yep, that should work
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henryataaAuthor Commented:
OK,
I will post the results when I'm done.
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henryataaAuthor Commented:
OK,
I almost got it but now Public Folders are giving me a headache.  I do not have any on 2010 just in 2003.  How do I stop replication if I never set it up before?
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Justin DurrantSr. Engineer - Windows Server/VirtualizationCommented:
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Justin DurrantSr. Engineer - Windows Server/VirtualizationCommented:
You can also see here why a PF DB was created:

http://technet.microsoft.com/en-us/library/bb397221.aspx

:)
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henryataaAuthor Commented:
So it was my fault.  I do have a couple of Outlook 2003 users.  I'm going to upgrade them to 2007.  But when it asked, I said yes.

If I do the ADSIEdit fix, it won't delete the folders correct?  It will just delete the replication to 2010, yes?
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Justin DurrantSr. Engineer - Windows Server/VirtualizationCommented:
Correct.. just follow that link
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henryataaAuthor Commented:
Hmm,
I don't see a CN=Public Folders.  All I see is:

CN=Active Directory Connections
CN="My domain"

Within "My domain", I don't see a CN=Public Folders.  Is it just me?
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henryataaAuthor Commented:
Anyone?
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henryataaAuthor Commented:
After snooping around.  I found this:
CN=Administrative Groups
CN=Exchange Administrative Group (FYDIBOHF23SPDLT)
CN=Databases
CN=Public Folder Database 0223504044

If I delete that entry (including its contents), would that allow me to uninstall Exchange?  Would that hurt anything?
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Justin DurrantSr. Engineer - Windows Server/VirtualizationCommented:
Yep. Just make sure none of your exhange 2003 server are associated with that PB database.
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henryataaAuthor Commented:
Ugh!
OK, how do I do that?  BTW, I really appreciate the help.
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Justin DurrantSr. Engineer - Windows Server/VirtualizationCommented:
Open ESM and make you have no Exchange 2003 servers in the FYDIBOHF23SPDLT admin group.
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henryataaAuthor Commented:
OK,
They are not in that Group.  They have their own.  Plus the object I mentioned only has an entry for the 2010 server.  So...is it safe to blow it out?
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Justin DurrantSr. Engineer - Windows Server/VirtualizationCommented:
Yep!
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henryataaAuthor Commented:
OK,
Thanks.  I'll do it first thing tomorrow morning.  I'll post the results.
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henryataaAuthor Commented:
So I deleted the setting and it is now uninstalling.  Thanks!
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Justin DurrantSr. Engineer - Windows Server/VirtualizationCommented:
Super!
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