Task 'Microsoft Exchange Server' reported error (0x8004010F):
 'The operation failed. An object could not be found.'

.

To solve this issue you can force Outlook to communicate directly with the global catalog server in its site or with the closest catalog if the client moves between sites.
Notice that you need to edit a registry value, so make sure you take a backup of your registry before changing any value.

To force Outlook to communicate with the closest global catalog server:
-Open the Registry Editor. Click Start, click Run, type regedit.exe, and then click OK.
-Locate the following key in the registry:
HKEY_CURRENT_USER\Software\Microsoft\Exchange\Exchange Provider
You may have to create the registry path if it does not exist.
-On the Edit menu, click Add Value, and then add the following registry value:
Value name: Closest GC
Data type: REG_DWORD
Value data: 1
-Quit Registry Editor.

Or use the following command to create the key and the value:
REG ADD “HKEY_CURRENT_USER\Software\Microsoft\Exchange\Exchange Provider” /v “Closest GC” /t REG_DWORD /d 1

To force Outlook to communicate with the a specific global catalog server:
-Open the Registry Editor. Click Start, click Run, type regedit.exe, and then click OK.
-Locate the following key in the registry:
HKEY_CURRENT_USER\Software\Microsoft\Exchange\Exchange Provider
You may have to create the registry path if it does not exist.
-On the Edit menu, click Add Value, and then add the following registry value:
Value name: DS Server
Data type: REG_SZ (string)
Value data: FQDN.OF.GlobalCatalog
-Quit Registry Editor.

Or use the following command to create the key and the value:
REG ADD “HKEY_CURRENT_USER\Software\Microsoft\Exchange\Exchange Provider” /v “DS Server” /t REG_SZ /d GC.Child.Domain.Local

EntryType : Error
EventID : 9334
Message : OALGen encountered error ffffffff while initializing the offline address list
generation process. No offline address lists have been generated.
Please check the event log for more information.
- Default Offline Address Book

Category : OAL Generator
CategoryNumber : 13
ReplacementStrings : {ffffffff, Default Offline Address Book}
Source : MSExchangeSA
TimeGenerated : 7/17/2008 3:10:31 PM
TimeWritten : 7/17/2008 3:10:31 PM

EntryType : Warning
EventID : 9109
Message : OALGen encountered an error ffffffff (internal ID 505068d) while generating address list ‘/o={Organization Name}/cn=addrlists/cn=oabs/cn=Default Offline Address Book’. Check other logged events to see if this is a serious error.
- Default Offline Address Book

Category : OAL Generator
CategoryNumber : 13
ReplacementStrings : {ffffffff, 505068d, /o={Organization Name}/cn=addrlists/cn=oabs/cn=Default Offline Address Book, Default Offline Address Book}
Source : MSExchangeSA
TimeGenerated : 7/17/2008 3:10:31 PM
TimeWritten : 7/17/2008 3:10:31 PM

Microsoft told us that this is a Bug and they are working to solve it, but don’t worry there is a workaround to generate the Offline Address Book.

When we are installing the mailbox server role the setup process will create the following registry value ‘SYSTEM\CurrentControlSet\Services\MSExchangeSA\Parameters\{Clustered-Mailbox-Server name}\OabDropFolderLocation’ which is the shared registry location between the server nodes, and points to the existing path on shared storage.

The bug is that the Exchange 2007 can not generate the OAB on the shared media using this type of cluster. So you have to change the registry value to point to a path that is stored locally on the node, e.g. ‘C:\ExchangeOAB’.
Now try to generate the offline address book.
Update-OfflineAddressBook “Default Offline Address Book”
The OAB must now be successfully generated. Do the same procedure on the other node.