Removing Public Folders from Exchange 2007

Question

Hello
I am part way through migrating from Exch 2007 to 2010.
All my mailboxes are over and the new server is working as I want it to.  The problem has come when trying to un-install the 2007 server.  I get the following error:
Summary: 3 item(s). 2 succeeded, 1 failed. 
Elapsed time: 00:00:20
Mailbox Role Prerequisites
Failed
Error:
Uninstall cannot continue. Database 'Public Folder Database': The public folder database "JUPITER\Second Storage Group\Public Folder Database" contains folder replicas. Before deleting the public folder database, remove the folders or move the replicas to
another public folder database. For detailed instructions about how to remove a public folder database, see http://go.microsoft.com/fwlink/?linkid=81409.
Recommended Action: http://go.microsoft.com/fwlink/?linkid=30939&l=en&v=ExBPA.12&id=b6e3b32a-8848-46cb-9567-72288ac15f60
I've gone round google at least 3 times now reading posts about moving the mailboxes and force-able removing them but nothing works and the folders remain.  Below is what I get when trying to follow the standard process of moving them.
[PS] C:\Windows\system32>MoveAllReplicas -Server Old -newserver new
Set-PublicFolder : The parameter "Replicas" cannot be $null or an empty array.
At C:\Program Files\Microsoft\Exchange Server\Scripts\ReplaceReplicaOnPFRecursi
ve.ps1:147 char:24
+         $_ | set-publicfolder <<<<  -server $_.OriginatingServer;
    + CategoryInfo          : InvalidOperation: (\NON_IPM_SUBTRE...ne Address
   Book:PublicFolderId) [Set-PublicFolder], InvalidOperationException
    + FullyQualifiedErrorId : 7492CDDB,Microsoft.Exchange.Management.MapiTasks
   .SetPublicFolder 
I'm not the most experienced exchange admin so it could be something simple ive over looked.
Thanks in advance.

Answer 1

If you can confirm the PF's have been replicated properly and rehomed to the Exchange 2010 Server then you can just manually remove the Ex2007 PF store, I have had to do this a few times so I could just get the Ex2007 uninstall to proceed.
In ADSIEdit, go to Configuration, Configuration, Services, Microsoft Exchange, FirstOrganization, Administrative Groups, Exchange Administrative Group, Servers, Servername, Information Store, First Storage Group.  Then on the right hand pane, highlight
the Public Folder Store and Delete it.MVP Exchange Server