Offline client error: Archive Manager (Inbox): Error: (12031) Unknown error, unable to get descri (4262421)

At the end of Offline Client synchronization one of the following errors are being displayed:

Offline client error:Archive Manager (Inbox): Error: (12031) Unknown error, unable to get description

Offline client error:Archive Manager (Inbox): Error: (12002) Unknown error, unable to get description

This is due to one or more messages which cannot be synchronized to the Archive Manager Offline Client because of corruption.

In order to find the offending messages, perform the instructions below:

1. On the client computer close Outlook.

2. Check the content of the log file located in "<Drive:\>:\Documents and Settings\<User account>\Local Settings\Application Data\Quest Software\Archive Manager\Logs and search for the following string "...Message was not copied into PST storage, operation fail, entry id:"

3. Make a note of the ID of the message. It would be in this format: a2a0fc1d-5017-6d58-87de-d50f98a0ea37. There may be more than one entries when you search for the text string above. Make sure you make a note of all these IDs

To find out which message this is referring to go to http://archivemanagerserver/ViewMessage.aspx?CheckSum=<messageid> where <messageid> is the value mentioned above (Do not include the <> around the messageid when typing the URL).

4. Create the following registry key in the client computer (to ignore it from being processed)

Path: HKEY_CURRENT_USER\Software\Policies\Quest Software\Archive Manager\Client\Offline2
Key: IgnoreChecksumList (String Value)
Value: <Message id>

Note: If more than one Message IDs were found in step 2 above, separate the messageIDs with semicolon in the Value field of the Registry Key

5. Run Outlook and restart the Synchronization process.