Public Folder Migration issues

Question

Hello,
I am at the last stages of migrating from exchange 2007 SP3 to 2010 SP3. Both versions have a CAS, HT, and MBX server. I've moved all the databases across and also replicated the public folder contents using: 
AddReplicaToPFRecursive.ps1 -Server 2007MBX -TopPublicFolder "\" 
-ServerToAdd 2010MBX
After resolving all the public folder item errors that popped up, I decided to move the public folders
across. I ran the \moveallreplicas.ps1 script.
On the Exchange 2007 MBX server, I got some EXCDO errors :
Event ID 8237: Calendaring agent failed with error 0x80040219 while attempting to open the
status message. If the user is a delegate, the access rights to the mailbox might not be set up correctly.  Otherwise, the calendar for this mailbox could be corrupted. This could be fixed by moving the mailbox to another Exchange server, or exporting
the calendar to a Personal Folder File (.PST), and re-importing this into a new calendar. 
Followed by 
Event ID 8207: Calendaring agent failed with
error code 0x80040219 while deleting appointment.
and then event ID 8200: Calendaring agent failed in message delete notification with error 0x80040219 on : /Example folder/Staff/Room1/tom jones-280257926.EML.
There were a few instances of these but the script ran succesfully. After the script ran, I checked the replication settings on the public folders and system public folders and on both servers every folder was set to replicate to only the new Exchange 2010
MBX.
On the Exchange 2007 MBX, if I run : getpublicfolderstatistics -server ex2007mbx  I get :
Name                                     ItemCount               LastAccessTime
exchangeV1                               401                25/03/2015 21:33:24
If I run getpublicfolderstatistics -server ex2010mbx I get : 
The operation cannot be executed because there is no available public folder da
tabase on the server 'EX2010'. 
If I run the same commands on the EX2010 MBX, I get :
getpublicfolderstatistics -server ex2007mbx  I get :
Name                                     ItemCount               LastAccessTime
exchangeV1                               401                25/03/2015 21:33:24
getpublicfolderstatistics -server ex2010mbx :
The entire list of public folders including the exchangev1 folder with 401 items.
I have checked the permissions on the exchangev1 folder which is in system public folders>schema+root>Microsoft.
I have dismounted the public folder database on the EX2007MBX and I can access public folders ok. There are no errors and in the folders I have tried, I can add/ delete items.
Would anyone please be able to advise on the following:
1) What do I do about the EXCDO errors? They have not recurred since I ran the script and did not occur before I ran the script. What are the implications of the errors?
2)Running getpublicfolderstatistics -server ex2010mbx  on the Exchange 2007 MBX gives me: 
The operation cannot be executed because there is no available public folder da
tabase on the server 'EX2010'. 
However, the public folders do seem to appear on the EX2010MBX. Is this because EX2007 cannot see the 2010 database?
3)How do I move the last folder on EX2007MBX: Exchangev1?
Thanks very much,
HA.

Answer 1

Hi,
From your description, I would like to clarify the following thing:
Lower version (Exchange 2007) cannot get the database information of higher version (Exchange 2010), it is the expected behavior. Your understanding will be appreciated.
Best regards,
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Amy Wang
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