Exchange 2013 Move a public folder mailbox to a different mailbox database, identity issues.

Hello,

I have public folders set up on an Exchange 2013 server which have been working for a couple of years now.  I need to move the public folders from this server to a new Exchange 2013 server.  According to this article it should be a straight forward process:

technet.microsoft.com/en-GB/library/jj906434(v=exchg.150).aspx

However I have hit a snag.  The identity of my public folders is invalid.  When I run the appropriate command active directory cannot find the public folders.

[PS] C:\Windows\system32>New-MoveRequest -Identity \ -TargetDatabase "Mailbox Database"
Active Directory operation failed on TEST-DC01.domain.local. This error is not retriable. Active directory
response: The search filter is invalid.
    + CategoryInfo          : NotSpecified: (:) [New-MoveRequest], ADOperationException
    + FullyQualifiedErrorId : [Server=TEST-EX01,RequestId=1b2a63b8-e050-40b4-88c8-00c2d9280260,TimeStamp=24/09/2015 16:
   01:23] [FailureCategory=Cmdlet-ADOperationException] F7F0E30A,Microsoft.Exchange.Management.RecipientTasks.NewMove
  Request
    + PSComputerName        : TEST.domain.local

I have changed the domain for security but I have not removed the identity, that is what my public folders are called.  If I run "Get-Publicfolder | fl" this is the output:

RunspaceId              : 743749f5-994d-43e7-ae40-e051494e25f2
Identity                : \
Name                    : IPM_SUBTREE
MailEnabled             : False
MailRecipientGuid       :
ParentPath              :
ContentMailboxName      : MasterHierarchy
ContentMailboxGuid      : 871735a6-6115-4f76-bcf3-5bf4593413b0
EformsLocaleId          :
PerUserReadStateEnabled : True
EntryId                 : 00000000XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX0000000000020000
DumpsterEntryId         : 00000000XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX00000000000A0000
ParentFolder            : 00000000XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX0000000000010000
OrganizationId          :
AgeLimit                :
RetainDeletedItemsFor   :
ProhibitPostQuota       : Unlimited
IssueWarningQuota       : Unlimited
MaxItemSize             : Unlimited
LastMovedTime           :
FolderSize              : 0
HasSubfolders           : True
FolderClass             :
FolderPath              : {}
DefaultFolderType       : None
ExtendedFolderFlags     :
MailboxOwnerId          : domain.local/Users/MasterHierarchy
IsValid                 : True
ObjectState             : Unchanged

How do I move the public folders without a name, or how do I give the public folders a name so that I can then move them?

Thank you,

Tony