Exchange 2010 Public Folders Cannot Change Permissions Errors from Management Console and Powershell

Question

This problem does not affect new public folders, only old ones that have probably been on Exchange 2000/2003 servers in the past. Migrations I believe did go smoothly but now have errors.
Error Reported is:
Microsoft Exchange Error
The following error(s) occurred while saving changes:
Add-PublicFolderClientPermission
Failed
Error:
Failed to modify the MAPI.NET table property of the object "000000001A447390AA6611CD9BC800AA002FC45A030064004E9CC2F8DD46B5E1E4578DE6D8030000000278E90000" on server "FQDN.Server.Name". See inner exception for more information.
MapiExceptionNonCanonicalACL: Unable to modify table. (hr=0x80004005, ec=2409)
Diagnostic context:
    Lid: 40487   EMSMDBMT.EcDoRpcExt2 called [length=218]
    Lid: 56871   EMSMDBMT.EcDoRpcExt2 returned [ec=0x0][length=356][latency=0]
    Lid: 23226   --- ROP Parse Start ---
    Lid: 27962   ROP: ropModifyACL [64]
    Lid: 17082   ROP Error: 0x969    
    Lid: 27745 
    Lid: 21921   StoreEc: 0x969    
    Lid: 27962   ROP: ropExtendedError [250]
    Lid: 1494    ---- Remote Context Beg ----
    Lid: 26426   ROP: ropModifyACL [64]
    Lid: 22086 
    Lid: 27128 
    Lid: 27232   StoreEc: 0x8004010F
    Lid: 27128 
    Lid: 27232   StoreEc: 0x8004010F
    Lid: 22086 
    Lid: 21970   StoreEc: 0x8004010F PropTag: 0x3D210102
    Lid: 19149   Error: 0x0
    Lid: 24509   Error: 0x0
    Lid: 31229   Error: 0x0
    Lid: 21970   StoreEc: 0x8004010F PropTag: 0x668F0040
    Lid: 6671    StoreEc: 0x8004010F
    Lid: 24976 
    Lid: 24952 
    Lid: 25472 
    Lid: 7972    StoreEc: 0x969    
    Lid: 26532 
    Lid: 4920    StoreEc: 0x969    
    Lid: 5119    StoreEc: 0x969    
    Lid: 5247    StoreEc: 0x969    
    Lid: 17916   StoreEc: 0x969    
    Lid: 4814    StoreEc: 0x969    
    Lid: 1750    ---- Remote Context End ----
    Lid: 26849 
    Lid: 21817   ROP Failure: 0x969    
    Lid: 29150 
    Lid: 20446   StoreEc: 0x969    
OK
From ExFolders we get error "Exception: Object Reference not set to an instance of an object"
Any thought on how to fix permissions, people who already had permission in the past can see and access them OK and all objects, but we cannot change/update or remove permissons
We alos receive similar error from the powershell.

Answer 1

Hi,
Could
you please  add a new public folder hierarchies with ADSIEdit as following setups.
For how to use ADSIEdit ,you can access:
http://technet.microsoft.com/en-us/library/cc773354(WS.10).aspx
1.Run ADSIEdit, right click Exchange Administrative Group under “Configuration \ services \ Microsoft
Exchange \ Organization name \ Administrative groups”.
2.Select New Object.
3.Select msExchPublicFolderTreeContainer for the class and click Next.
4.Enter the following for the value:
Folder Hierarchies, click Next.
5.Click Finish.
6.Create
Public Folder Tree Object.
7.Right click CN=Folder Hierarchies -> New Object.
8.Selected msExchPFTree for the class.
9.For the value we entered, "Public Folders" and clicked next.
10.Clicked on the "More Attributes" button, selected msExchPFTreeType .
11.Set the value
to 1.
 Note: This is very important that this value is set
to a value of 1 as This tells Exchange that this is a MAPI Tree.
12.Click Ok and then finish.
13.We then went
to the properties of the newly created "Public Folders" Tree object in
ADSIEdit.
14.Copy the distinguished name value
to the clipboard and then click cancel.
15.Navigate
to the Storage group that contains the Public
Folder Store for this server and get properties of the server.
16.Locate the msExchOwningPFTree attribute and paste in the value that was copied
from the Public folders Distinguish name attribute.
17.Restart the Information Store Service.
18.Mounted and dismount the PF store.
19.Open Outlook with administrator,give full permission to default owner.
Hope it can help you!