Mailbox content is not copied from source mailbox to target (4348649)

Mailbox content is not copied from source mailbox to target mailbox. The following error message appears in the MTA.log: 4/09/2004 14:16:47 MailContainer::GetNextFolder Warning 1704 Target folder not found. Probably it was deleted or has not been synchronized yet (SourceKey = '5C0296D26910694BB9A9BBFC577E7AB00000021D29C9').
14/09/2004 14:16:47 MailContainer::IsEmpty Warning 1703 Mail container still has some unsynchronized data: hierarchy - 0, content - 3.
14/09/2004 14:16:47 MailKernel::ImportMailbox Warning 2024 Cannot delete the current PST file 'C:\WINDOWS\System32\Aelita Exchange Migration Wizard.

Usually this issue is caused by the fact that mailbox hierarchy was not copied from source mailbox to target one. It can occur if the PST file containing the mailbox hierarchy is missed or corrupt on the target. In this case mail target agent cannot extract the received messages as there are no corresponding mailbox folders.

To resolve this issue the please perform the following steps:
-Expand Synchronization Jobs
-Expand Mailbox Synchronization,
-Expand the Server pair, exposing the Mail Synchronizaiton Collections,
-Right Click the collection containing the mailbox(e) missing permissions,
-Click Properties,
-Click Synchronization,
-Click the first checkbox "Synchronize only new mailbox items and changes made to already switched mailboxes" if the mailbox(e) are switched,
-Click the second checkbox "Resynchronize" and Click YES to confirm the Resynchronization,
-Move the radial button to the third option "Mailbox folder permissions and folder associated information"
-Click OK,
-Right Click the Server Pair and committ Changes.